The Twelfth Doctor (2014-2017)
Season Thirty-Four 
(2014) Season Thirty-Four (2014): Old Soldiers
First appearances of Missy, Danny, Courtney and Santa Claus.


Specials (2015-16): Song For A Winter's Night
First appearance of Nardole.
Specials 
(2015-16)
Special (2014) Special (2014): Visions Of Sugar Plums
Season Thirty-Six (2017): Deserts Of Vast Eternity
First appearance of Bill.
Season Thirty-Six 
(2017)
Season 
Thirty-Five (2015) Season Thirty-Five (2015): The Long Way
First appearance of Ashildr.
Special (2017): Twelfth Night
First appearance of the Captain.
Special 
(2017)

Season Thirty-Four (2014): Old Soldiers

The Doctor
The Twelfth Doctor

Peter Capaldi (bio) made his first appearance as the Doctor in The Day Of The Doctor (November 2013) and his last in Twice Upon A Time (December 2017).

Companions and Recurring Characters

A notorious troublemaker at Coal Hill School, student Courtney Woods eventually earned the reluctant Doctor's permission to take a trip aboard the TARDIS.

Ellis George (bio) made her first appearance as Courtney in Deep Breath (August 2014) and her last in Kill The Moon (October 2014).

Courtney Woods

After escaping from Gallifrey, the Master -- now in a female body and calling herself Missy -- continued to bedevil the Doctor, only to find herself reconsidering her dastardly ways.

Michelle Gomez (bio) made her first appearance as Missy in Deep Breath (August 2014) and her last in The Doctor Falls (July 2017).

Missy

A former soldier turned Coal Hill School maths teacher, Danny Pink fell in love with Clara Oswald, but he struggled to accept the dangers which were an inextricable part of her relationship with the Doctor.

Samuel Anderson (bio) made his first appearance as Danny in Into The Dalek (August 2014) and his last in Last Christmas (December 2014).

Danny Pink

Although he -- perhaps -- turned out to be a manifestation of the human mind's determination to defend itself, Santa Claus was instrumental in inspiring the Doctor to defeat the Kantrofarri.

Nick Frost (bio) made his first appearance as Father Christmas in Death In Heaven (November 2014) and his last in Last Christmas (December 2014).

Santa Claus

The Stories
Deep Breath
Deep Breath by Steven Moffat, directed by Ben Wheatley
Vastra, Jenny and Strax investigate the appearance of a tyrannosaurus rex in Whitehall, only to discover that it has accidentally accompanied Clara and the newly-regenerated Doctor. When the dinosaur suddenly combusts, the unstable Time Lord sets off on his own to investigate, little realising that a clockwork robot with half a face is stalking Victorian London. Meanwhile, Clara grapples with the profound change in the Doctor, until a mysterious message draws the pair back together. But when a confrontation with the Half-Face Man ensues, Clara must decide whether she can still trust the man she thought was her best friend.
Into The Dalek
Into The Dalek by Phil Ford and Steven Moffat, directed by Ben Wheatley
The Doctor saves a soldier named Journey Blue from the Daleks and returns her to her command ship, the Aristotle. There he discovers that the Galactic Resistance has captured a lone Dalek which has vowed to destroy its own kind. The Doctor agrees to investigate the unprecedented malfunction, so he fetches Clara from an awkward encounter with her new colleague, Danny Pink. Back aboard the Aristotle, Journey and the time travellers are miniaturised and injected into “Rusty”. But as they navigate the casing's lethal defences, the Doctor must also confront the question of whether there can ever truly be a good Dalek.
Robot Of Sherwood
Robot Of Sherwood by Mark Gatiss, directed by Paul Murphy
Clara wants to meet Robin Hood, but the Doctor scoffs at the notion of seeking out someone he believes to be a fictional character. No sooner do they land in 1190 Sherwood Forest, however, than they encounter the legendary rogue and his Merry Men. The Doctor and Clara learn that the countryside is indeed being oppressed by the Sheriff of Nottingham, who is stealing gold and kidnapping peasants for labour. But when the Sheriff's knights are revealed to be robots and his castle turns out to be a spaceship, the Doctor becomes more convinced than ever that Robin is not what he appears.
Listen
Listen by Steven Moffat, directed by Douglas Mackinnon
Could a creature evolve that hid itself so perfectly, no one ever knew it existed? Could it be the reason we speak aloud when we think we're alone? Is it why sometimes, when we wake in the night in an empty room, we still feel an eerie presence? Driven to answer these questions, the Doctor connects Clara to the TARDIS telepathic circuits in order to travel back to a time when she believed there was a monster under her bed. But Clara is preoccupied with her disastrous first date with Danny Pink, and so she instead catapults them from an orphanage in the mid-Nineties to a capsule stranded at the very end of time...
Time Heist
Time Heist by Steve Thompson and Steven Moffat, directed by Douglas Mackinnon
The Doctor and Clara awaken to find themselves in a room with a shapeshifter named Saibra and a hacker called Psi. Their short-term memories have been wiped, and they know only that they have been assembled by a mysterious Architect to break into the intergalactic Bank of Karabraxos. Despite having little understanding of their goal, they agree to work together to confront the Bank's sophisticated and deadly anti-intrusion measures. The most formidable of all is the Teller, a creature controlled by the icy head of security, Ms Delphox. It has the power to sense the guilty -- and liquefy their brains.
The Caretaker
The Caretaker by Gareth Roberts and Steven Moffat, directed by Paul Murphy
Already struggling to keep her life in the TARDIS separate from her relationship with Danny Pink, Clara is astonished when the Doctor arrives at Coal Hill School. He is tracking a lethal alien war machine called the Skovox Blitzer, and is posing as the school caretaker to facilitate his search. But the Doctor's efforts to snare the robot in a time trap are complicated by the involvement of school troublemaker Courtney Woods. To make matters worse, a frosty rapport develops between the Time Lord and an unsuspecting Danny -- which comes to a head when Danny inadvertently foils the Doctor's plan to deal with the Blitzer.
Kill The Moon
Kill The Moon by Peter Harness, directed by Paul Wilmshurst
Clara admonishes the Doctor for his treatment of Courtney Woods, so he decides to take both teacher and pupil on a trip to the Moon in the year 2049. But there is a mystery afoot on the lunar surface: the gravity is wrong, the landscape is wracked by seismic activity, and spider-like monsters lurk in the shadows. With tidal chaos wreaking havoc on Earth, Captain Lundvik arrives on a recycled space shuttle, determined to solve the crisis -- or destroy the Moon with an arsenal of nuclear weapons. When the Doctor refuses to become involved, Clara is faced with a terrible decision which may affect the future of the human race.
Mummy On The Orient Express
Mummy On The Orient Express by Jamie Mathieson, directed by Paul Wilmshurst
Clara agrees to accompany the Doctor on one final trip in the TARDIS, so he takes her aboard the luxurious Orient Express -- or rather, its recreation as a hyperspatial passenger train. However, they soon learn that the Express is haunted by a legendary mummy called the Foretold. Unseen by anyone else, it appears to its victim precisely sixty-six seconds before it takes their life. Soon, strange coincidences start to pile up -- such as the fact that one of the passengers just happens to be an expert in alien mythology. Even as the body count rises, the Doctor begins to realise that somebody is playing a very dangerous game...
Flatline
Flatline by Jamie Mathieson, directed by Douglas Mackinnon
When the TARDIS is mysteriously dragged off-course to Bristol, Clara goes investigating while the Doctor tries to figure out what's wrong with the Ship. But when something in the vicinity begins leeching its external dimensions, the Doctor finds himself trapped within a rapidly shrinking time machine. The mystery deepens as Clara learns about a series of disappearances which have plagued the area in recent weeks. With the help of a young graffiti artist named Rigsy, she finds herself thrust into the Doctor's role, battling invading forces which quite literally hail from another dimension.
In The Forest Of The Night
In The Forest Of The Night by Frank Cottrell-Boyce, directed by Sheree Folkson
Having chaperoned an overnight class trip, Clara and Danny awaken in the morning to discover that a forest has grown up all across the world. Amongst the trees infesting London, the Doctor meets Maebh, one of their pupils. Troubled ever since the disappearance of her sister a year earlier, Maebh now seems to have developed a strange connection to the mysterious events. When she goes missing, the Doctor and Clara set off into the woods to find her. In the process, they discover that a deadly solar flare is hurtling towards the Earth -- but are the trees another agent of the planet's destruction, or of its salvation?
Dark Water / Death In Heaven
Dark Water / Death In Heaven by Steven Moffat, directed by Rachel Talalay
When Danny is killed in a traffic accident, Clara demands that the Doctor save him. The Doctor decides to take Clara beyond the mortal veil, using the TARDIS telepathic circuits to plot a course. They materialise in the halls of an organisation called 3W, where the corridors are lined with skeletons floating in a mysterious dark water. There they meet the enigmatic Missy, and learn that Danny now dwells in a realm called the Nethersphere. But when Missy reveals herself to be a very old acquaintance of the Doctor's, the time travellers realise that they have fallen into a trap which transcends life and death.

Making History

The practice of dividing the broadcast season into distinct halves was jettisoned for Season Thirty-Four. Instead, all twelve episodes were transmitted in the fall -- the first time since 1989 that a full season of Doctor Who aired during the autumn months. In the wake of the complex story arcs which characterised Matt Smith's tenure as the Eleventh Doctor, executive producer Steven Moffat embraced a looser, more character-driven umbrella storyline for Peter Capaldi's initial season. Events culminated in the mould-shattering introduction of Michelle Gomez as Missy: the first female incarnation of the Master.

Special (2014): Visions Of Sugar Plums

The Story
Last Christmas
Last Christmas by Steven Moffat, directed by Paul Wilmshurst
Clara discovers a man who claims to be Santa Claus on her rooftop, leading to a reunion with the Doctor. Before long, they find themselves at the North Pole, where a scientific research base has become infested with Kantrofarri. Also known as Dream Crabs, the creatures attach themselves to a victim and induce a state of euphoric reverie, all while slowly devouring their host. When Clara is attacked by a Dream Crab and believes herself to be celebrating Christmas Day with Danny Pink, the Doctor turns to Santa for help. But how can dreamers ever recognise that they are dreaming?

Season Thirty-Five (2015): The Long Way

Companions and Recurring Characters

Ashildr was an outcast Viking girl who became effectively immortal when she was bonded with an alien healing device. Over the centuries, her relationship with the Doctor became fractious when she began to believe that, much as his role was to protect the world from those would do it harm, hers was to protect it from the Doctor.

Maisie Williams (bio) made her first appearance as Ashildr in The Girl Who Died (October 2015) and her last in Hell Bent (December 2015).

Ashildr

The Stories
The Magician's Apprentice / The Witch's Familiar
The Magician's Apprentice / The Witch's Familiar by Steven Moffat, directed by Hettie MacDonald
On a wartorn planet, the Doctor encounters a young boy who has stumbled into a lethal trap. However, when the Doctor realises that the planet is Skaro, and the child is Davros -- who will grow up to become the creator of the Daleks -- he abandons the boy to his fate. Appalled by his own actions, a recalcitrant Doctor goes into seclusion; he sends his confession dial, a Time Lord's last will and testament, to Missy. His old enemy recruits Clara to help track him down, but they are followed by a servant of Davros' called Colony Sarff. Davros is nearing the end of his life, and now remembers that fateful day on Skaro. But is he really seeking absolution, or has the Doctor become ensnared in a terrible deception?
Under The Lake / Before The Flood
Under The Lake / Before The Flood by Toby Whithouse, directed by Daniel O'Hara
In 2119, the Drum underwater mining facility sits on the bottom of a Scottish lake near a submerged town, from which a spaceship has been recovered. Captain Moran dies after observing strange symbols carved into the vessel's hull... and then reappears as a hideously distorted phantom, mouthing silent words. When the TARDIS arrives, the Doctor and Clara discover that a second ghost has joined Moran, and they are trying to add to their ranks by killing the Drum's remaining personnel. The Doctor realises that the truth about the spectres lies in 1980 -- in the hours before the town was drowned -- with the terrible Fisher King.
The Girl Who Died
The Girl Who Died by Jamie Mathieson and Steven Moffat, directed by Ed Bazalgette
In the ninth century, the Doctor and Clara are captured by Vikings and taken to their village. No sooner have they arrived, however, than an enormous face materialises in the sky, claiming to be the god Odin. He collects the strongest men of the settlement -- inadvertently taking Clara and an unusual girl called Ashildr, too. They discover that their captor is actually the leader of the bloodthirsty Mire, a race which harvests the testosterone from warriors. When Ashildr declares war upon the Mire, a reluctant Doctor finds himself trying to prepare the outmatched Viking survivors for battle against an indomitable alien army.
The Woman Who Lived
The Woman Who Lived by Catherine Tregenna, directed by Ed Bazalgette
In 1651, the Doctor vies with a highwayman called the Knightmare for alien technology masquerading as a noblewoman's jewel. But the hunt is complicated by the fact that the Knightmare is really Ashildr -- now centuries old and calling herself “Lady Me” as the memories of her original life fade with the passage of time. Reluctantly, the Doctor accepts Ashildr's help in recovering the jewel, even as he is forced to confront the ramifications of his decision to bestow immortality upon her. But Ashildr has formed a secret alliance with the alien Leandro -- one which may have devastating consequences for the Earth.
The Zygon Invasion / The Zygon Inversion
The Zygon Invasion / The Zygon Inversion by Peter Harness and Steven Moffat, directed by Daniel Nettheim
Once upon a time, the Doctor helped broker an agreement which led to the secret resettlement of twenty million Zygons to modern-day Earth. Now, however, the truce is unravelling as a splinter faction of Zygons calling itself Truth or Consequences demands the right to live without taking human form. The Doctor is summoned back to Earth by Osgood, just before she is captured by the terrorists. Matters quickly escalate as the Zygon High Command is kidnapped and killed. And even the Doctor may not suspect the extent of the splinter group's success in infiltrating his circle of friends and allies...
Sleep No More
Sleep No More by Mark Gatiss, directed by Justin Molotnikov
In the thirty-eighth century, the Le Verrier space station is a scientific facility in orbit around Neptune. When it goes silent, a rescue team led by Commander Nagata is despatched, and encounters the Doctor and Clara. Soon they are attacked by creatures made up of particulate matter, which Clara dubs Sandmen. They discover that Le Verrier is where Gagan Rassmussen has been conducting experiments to improve his Morpheus pods: devices which compress a full night's sleep into a matter of minutes. The Doctor realises that the Sandmen are the children of the Morpheus process -- and represent a threat to all humanity.
Face The Raven
Face The Raven by Sarah Dollard, directed by Justin Molotnikov
Rigsy summons the Doctor and Clara for help after waking up with no memory of the previous day, and a tattoo on his neck which is inexorably counting down. Discovering that Rigsy has recently had significant contact with extraterrestrial life, the Doctor searches for a hidden place in the heart of London. He finds a street which serves as a refuge for aliens, where the self-styled mayor is none other than Ashildr. She keeps the peace via a Quantum Shade: an unstoppable killer which manifests as an eerie raven. Rigsy stands accused of murder and, unless the Doctor can unravel the mystery, someone will inevitably face the raven.
Heaven Sent
Heaven Sent by Steven Moffat, directed by Rachel Talalay
The Doctor finds himself transported to a mysterious castle, where the walls revolve like gears. Outside is only the sea, its bed laden with ancient skulls. Inside, the rooms seem haunted by nightmares drawn from the Doctor's own memories. Stalking the halls is a shrouded creature; its pursuit of the Doctor is virtually ceaseless, pausing only when the Time Lord reveals one of his secret truths. As he explores the castle, the Doctor uncovers clues which point towards a particular room hidden deep within the edifice. But he also begins to suspect that he is embroiled in a trap which was sprung a very long time ago...
Hell Bent
Hell Bent by Steven Moffat, directed by Rachel Talalay
Gallifrey has been returned to the universe, and the Doctor has been returned to Gallifrey. His homecoming is anything but triumphant, however, as he finds himself hunted by Lord President Rassilon and the High Council. They demand that the Doctor divulge his knowledge of the Hybrid, the legendary entity that will stand in the ruins of Gallifrey. But he is determined to right the wrong of Clara's death, even if it means breaking the laws of time to rescue her from her final moments. The Doctor's grief takes him to the very end of the universe, where he must face the truth about the Hybrid... and make a terrible choice.
With the Doctor having lost his memory of her, Clara decides to travel with Ashildr before returning to the moment of her death.

Making History

By 2015, Doctor Who had enjoyed a decade of popular success since its revival in 2005. However, the television landscape was becoming ever more fragmented, especially as streaming became a popular alternative for viewers; like most programmes, Doctor Who's broadcast ratings were gradually dwindling. The situation was exacerbated during Season Thirty-Five by a later timeslot and an absence of cast changes or milestone anniversaries to serve as a promotional anchor. Despite the fact that Doctor Who was still one of the United Kingdom's most-watched dramas, the production team found itself defending the show against allegations that it just wasn't as popular as it used to be.

Specials (2015-16): Song For A Winter's Night

Companions and Recurring Characters

Formerly an inept cohort of River Song, Nardole became the Doctor's unlikely aide-de-camp, in the process demonstrating a keen insight that belied his cartoonish presentation.

Matt Lucas (bio) made his first appearance as Nardole in The Husbands Of River Song (December 2015) and his last in Twice Upon A Time (December 2017).

Nardole

The Stories
The Husbands Of River Song
The Husbands Of River Song by Steven Moffat, directed by Douglas Mackinnon
In the year 5343, a mistake by River Song's bumbling accomplice, Nardole, embroils the Doctor in her scheme to recover a priceless diamond. Known as the Halassi Androvar, it is embedded in the brain of Hydroflax, a galactic tyrant whose disembodied head pilots a powerful robot. Not only does River appear to be unaware of the Doctor's true identity, but she claims to be Hydroflax's wife -- as well as the bride of Ramone, one of her co-conspirators. The heist leads the Doctor and River to a spaceship full of the universe's vilest denizens, and a date with destiny that the Doctor has been avoiding for a very long time.
The Return Of Doctor Mysterio
The Return Of Doctor Mysterio by Steven Moffat, directed by Ed Bazalgette
The Doctor accidentally bestows the powers of a comic book superhero on a young boy named Grant. Grant promises that he will hide his extraordinary abilities but, as an adult, he reneges on his oath and becomes a masked vigilante known as the Ghost. Grant and the Doctor meet again when they both come to the aid of investigative journalist Lucy Fletcher. She has discovered that Harmony Shoal, an international research and development company, is really a front for an invasion of Earth. But the brain-like creatures behind Harmony Shoal have the ability to possess the human form -- and Grant becomes their next target.
Nardole now travels with the Doctor to help him overcome his grief at his final parting from River Song.

Making History

For the first time since Doctor Who returned to television in 2005, a full year elapsed between new episodes. This came about because the 2015 Christmas special, The Husbands Of River Song, was designed to be the last story overseen by executive producer Steven Moffat. Production and broadcast of Season Thirty-Six was deferred to provide time for his intended successor, Chris Chibnall, to take over. However, when it became clear that Chibnall would be unavailable for an additional year, Moffat agreed to remain on Doctor Who for one more run. With the transmission of Season Thirty-Six now delayed until Spring 2017, this meant that the next adventure to air would be the 2016 Christmas special, The Return Of Doctor Mysterio.

Season Thirty-Six: Deserts Of Vast Eternity

Companions and Recurring Characters

Bill Potts was a canteen worker at St Luke's University when her clever mind caught the Doctor's eye, leading her to become his protege and then his fellow traveller in time and space.

Pearl Mackie (bio) made her first appearance as Bill in The Pilot (April 2017) and her last in Twice Upon A Time (December 2017).

Bill Potts

The Stories
The Pilot
The Pilot by Steven Moffat, directed by Lawrence Gough
The Doctor and Nardole have spent years in seclusion at St Luke's University in modern-day Bristol, guarding a secret vault. But despite his intention to remain hidden, the Doctor can't resist taking a bright young canteen worker named Bill Potts under his wing. Bill has struck up a tentative relationship with Heather, a melancholy student who has a star-shaped defect in one eye. Heather is fascinated by a remote part of campus, where a strange puddle never evaporates. When Heather is transformed into an entity made entirely of water, Bill finds herself implacably pursued... and the Doctor is forced back into action.
Despite his misgivings, the Doctor invites Bill to join him and Nardole aboard the TARDIS.
Smile
Smile by Frank Cottrell-Boyce, directed by Lawrence Gough
The Doctor takes Bill to an Earth colony in the far future, only to find an empty city. The advance team -- which should be preparing for the colonists' arrival -- is missing. The only inhabitants are robots with heads that display emoji, which serve as the interface for the Vardies, a nanobot swarm from which the city is built. The time travellers discover that the advance team was murdered by the Vardies, which are targeting anybody who expresses a negative emotion. The Doctor realises that the city is a giant deathtrap which must be destroyed -- but it falls to Bill to discover the real reason for the Vardy mutiny.
Thin Ice
Thin Ice by Sarah Dollard, directed by Bill Anderson
The year is 1814. The waters of the Thames have frozen for the final time, and the last of the Frost Fairs is being held upon the ice. Soon after their arrival, the Doctor and Bill notice eerie lights beneath their feet. When they chase a young pickpocket to the edge of the Fair, they watch in horror as he's dragged down through the ice to his death. They discover that an enormous creature lurks beneath the Thames, chained for generations by the ancestors of the pompous Lord Sutcliffe. Now the nobleman has discovered that the creature's waste acts as a fantastic source of fuel, and he will stop at nothing to preserve his family secret.
Knock Knock
Knock Knock by Mike Bartlett, directed by Bill Anderson
Struggling to find a suitable place to live, Bill and several friends are approached by an elderly man who offers to rent them rooms in a decaying mansion. His only rule is that the tower at the heart of the structure is strictly out of bounds. On their first night in the house, however, it becomes clear that something strange is afoot. The wooden floors and panelling creak unnaturally, the trees sway without a breeze, mysterious insects roam the corridors... and, one by one, the roommates start to vanish. Fortunately, the Doctor has come along to help Bill unpack -- and together, they uncover a mystery which stretches back decades.
Oxygen
Oxygen by Jamie Mathieson, directed by Charles Palmer
A distress call brings the Doctor, Bill and Nardole to the Chasm Forge space station in the far future. There they find that only four out of forty crewmembers are still alive -- stalked by their deceased colleagues, whose corpses are still propelled by their exoskeletal Smartsuits. Someone or something has reprogrammed the suits, issuing new instructions to murder the station's crew. To make matters worse, this is an era in which oxygen is a highly regulated commodity. To continue breathing, the time travellers must risk everything and don the lethal Smartsuits themselves.
Extremis
Extremis by Steven Moffat, directed by Daniel Nettheim
The Pope summons the Doctor to the Vatican. The Haereticum, its library of banned and blasphemous texts, houses an ancient document called the Veritas -- “truth” -- written in a lost tongue. Now it has been translated, but every person who has read it has taken their own life. Seeking an explanation, the Pope asks the Doctor to read the Veritas himself. But while Bill and Nardole investigate a mysterious portal, the blind Doctor is stalked by corpse-like alien Monks. Meanwhile, in another time and place, long ago, Missy has been condemned for her crimes. The Doctor must decide whether she deserves execution... or redemption.
The Pyramid At The End Of The World
The Pyramid At The End Of The World by Peter Harness and Steven Moffat, directed by Daniel Nettheim
In Turmezistan, the sudden appearance of an ancient pyramid in close proximity to the Earth's three mightiest armies heralds the start of the Monks' scheme to take over the planet. Once again pressed into service as President of the world, the Doctor finds himself coordinating the responses of the American, Russian and Chinese forces, even as the Monks promise that the end of the human race is at hand. Meanwhile, a series of seemingly random events, playing out in a Yorkshire agricultural research lab, holds the key to the Monks' insidious plan...
The Lie Of The Land
The Lie Of The Land by Toby Whithouse, directed by Wayne Yip
The Monks have protected and guided the people of Earth since the beginning of time. Or have they been the planet's conquerors and dictators for just the last six months? Bill finds herself one of a small number of “memory criminals” who remember events differently, and she becomes determined to find the only man who can restore history to the way it was meant to be. But the Doctor is now a spokesperson for the Monks, reinforcing humanity's new narrative. With Nardole's help, Bill must undertake a desperate gambit to discover the truth.
Empress Of Mars
Empress Of Mars by Mark Gatiss, directed by Wayne Yip
A NASA probe discovers that the message “God save the Queen” was left on the surface of Mars more than a century ago. The Doctor, Bill and Nardole travel to the Red Planet in 1881 to investigate, and encounter a platoon of British soldiers. Colonel Godsacre explains that he found a crashed spaceship in the African veldt, aboard which was an Ice Warrior whom he's nicknamed “Friday”. Now the troops believe that they will be rewarded with riches excavated from beneath the Martian surface. But Friday's real goal is to free the Empress Iraxxa and her legions from stasis... while some of Godsacre's men have plans of their own.
The Eaters Of Light
The Eaters Of Light by Rona Munro, directed by Charles Palmer
The TARDIS arrives in second-century Scotland, where the Doctor plans to solve the mystery of the vanished Ninth Roman Legion. The travellers find the soldiers massacred, their bodies in a state of decay akin to decades of sunlight deprivation. The Doctor and Nardole are captured by the Picts who were fighting the Roman incursion, while Bill is rescued from an alien predator by the survivors of the Lost Legion. An interdimensional portal, hidden within a stone cairn, holds the secret to defeating the monster -- but conflict between the Picts and the Romans threatens to doom the world.
World Enough And Time / The Doctor Falls
World Enough And Time / The Doctor Falls by Steven Moffat, directed by Rachel Talalay
To test Missy's rehabilitation, the Doctor has her take his place alongside Bill and Nardole while investigating a distress signal. It emanates from an enormous colony ship, which is struggling to free itself from the gravitational pull of a black hole. To make matters worse, the vessel is overrun with lifeforms who seem to have appeared from nowhere. When Bill is badly injured, the invaders take her away to the lower decks, where time passes more quickly. There she discovers people submitting to eerie surgeries which will make them something other than human... and meets a kindly man who hides a terrible secret.
Nardole stays aboard the spaceship to defend against future Cyber incursions, while Bill departs to travel the universe with Heather.

Making History

Season Thirty-Six was Doctor Who's tenth since its return from cancellation in 2005. But it would also usher in another era of change for the programme, as Steven Moffat lay the groundwork for Chris Chibnall to take over. For his final season, Moffat decided to go back to basics, with a series of stories that gave the show a fresh perspective in the form of companion Bill Potts. The Doctor was given a new -- albeit temporary -- base of operations, in the form of St Luke's University, where he and Nardole guarded a vault which was ultimately revealed to hold Missy. And even the evil Time Lord would undergo a reappraisal, as she contemplated turning over a new leaf after so many years of villainy. Somehow, fifty-four years after its debut, Doctor Who was brand new all over again.

Special (2017): Twelfth Night

Companions and Recurring Characters

The Captain -- whose full name was Archibald Hamish Lethbridge-Stewart -- was a British soldier during the First World War, in the midst of which he encountered the First and Twelfth Doctors when the efforts of the time-travelling Testimony project went awry.

Mark Gatiss (bio) played the Captain in Twice Upon A Time (December 2017).

The Captain

The Story
Twice Upon A Time
Twice Upon A Time by Steven Moffat, directed by Rachel Talalay
On the verge of regenerating but weary of his long life, the Doctor finds himself in 1986 Antarctica. There he comes face to face with his original self, who is contemplating death as an alternative to enduring his first regeneration. Time suddenly comes to a stop, and they meet a British army captain from the First World War who is being pursued by a mysterious glass woman. Taken aboard her spaceship, the three men arrive in the Chamber of the Dead where, impossibly, the Doctor is reunited with Bill Potts. To understand the truth of these events, they embark on what may be the Doctor's final journey into time, space and memory.
Accepting that he is not yet ready to end his travels, the Doctor regenerates after succumbing to the injuries inflicted by the Cybermen.

Making History

With the Season Thirty-Six finale, World Enough And Time / The Doctor Falls, structured to build to the Twelfth Doctor's regeneration, it was assumed that the 2017 Christmas special would be the first adventure for the Thirteenth Doctor. When incoming showrunner Chris Chibnall decided that he instead wanted to launch the new Doctor at the start of a full season, the Twelfth Doctor's era was extended to include a special epilogue for the holiday season. To add to the sense of occasion, Twice Upon A Time featured the First Doctor on the brink of his own regeneration. David Bradley, who had portrayed William Hartnell in the 2013 docudrama An Adventure In Space And Time, was now recruited to play the version of the Doctor whom Hartnell had originated.