Born: 5th September 1964
Episodes Broadcast: 2007-2008

Stephen Greenhorn was born in Fauldhouse, Scotland. His first professional writing was for BBC Radio Scotland in the late Eighties, after which he concentrated on the theatre for a number of years. Greenhorn moved into television with a 1996 episode of The Bill. He then worked on programmes like Where The Heart Is and Glasgow Kiss, before creating the long-running soap opera River City for BBC Scotland. Greenhorn subsequently adapted Wild Sargasso Sea for executive producer Julie Gardner; this provided him with the opportunity to declare his interest in the revival of Doctor Who, on which she was also working. As a result, showrunner Russell T Davies approached Greenhorn about writing for the 2007 season, and the result was the mad scientist story The Lazarus Experiment. He returned the following year with The Doctor's Daughter; both were adventures for the Tenth Doctor, as played by David Tennant.

At the same time, Greenhorn was developing the acclaimed stage musical Sunshine On Leith, which he later adapted as a 2013 feature film. His television work during this time included Echo Beach and Marchlands; the latter was a supernatural drama starring Alex Kingston, who had played River Song in Doctor Who. During the Twenties, Greenhorn scripted two episodes of Dalgliesh before being reunited with Tennant on an installment of Around The World In 80 Days.