Born: May 1970 (as Jamie Alan Mathieson)
Episodes Broadcast: 2014-2015, 2017

Jamie Mathieson was raised in Nuneaton, Warwickshire and developed a talent for writing by devising stories for his younger brother. He came late to Doctor Who, having refused to watch it for years after being terrified at the age of five by 1975's Terror Of The Zygons. Nonetheless, Mathieson became an ardent fan of other genre offerings such as Sapphire & Steel and Blake's 7, as well as the comic book 2000 AD. He completed a Bachelor of Arts (Honours) degree in printmaking from Loughborough College in Leicestershire, but then found himself mired in a series of odd jobs. Mathieson eventually gained steady employment at a Royal Mail customer service call centre and, during this time, he began to hone his skills as a stand-up comedian. By the turn of the century, this had become Mathieson's full-time job, but he also began to contemplate a shift to screenwriting. Indeed, in 2005, he met with executive producer Julie Gardner about working on the recently-revived Doctor Who, although nothing came of this discussion.

In 2006, Mathieson wound down his stand-up gigs to focus on writing. He developed a screenplay for the comedic science-fiction film Frequently Asked Questions About Time Travel, a 2009 release for which he also served as an associate producer. This experience led to television work, including four episodes of the supernatural drama Being Human and one installment of the science-fiction mystery series Dirk Gently. Mathieson had a meeting with Doctor Who executive producer Steven Moffat in 2010, but his proposals were deemed to focus too much on high concepts, without emphasising how they would entertain audiences.

Finally, in 2013, Mathieson was given another opportunity to pitch for Doctor Who after Moffat's wife, producer Sue Vertue, spoke highly of his work. The result was Flatline for Peter Capaldi's first season as the Twelfth Doctor in 2014. The production team was so happy with the script that Mathieson was immediately commissioned for another adventure; Mummy On The Orient Express would actually air first. The following year, he and Moffat co-wrote The Girl Who Died, which introduced the immortal Ashildr as a recurring character. Mathieson's last Doctor Who script was 2017's Oxygen, in which the Doctor suffered the seemingly permanent loss of his vision. Meanwhile, he also developed the science-fiction mini-series Tripped and was the head writer on the French comic book adaptation Métal Hurlant: Origins.