We really are heading towards the end of an era on Doctor Who. Showrunner Steven Moffat and Twelfth Doctor Peter Capaldi will bow out for good in this year's Christmas special but their final series of Doctor Who ends in less than a month. So it feels like a good time to take a look back at Moffat's seven-year tenure in charge of Doctor Who (not to mention his five years as a writer before that), and Capaldi's three series in the role, by asking you what you think are their most significant moments and biggest contributions to Doctor Who.

On the following pages you'll find a series of polls, ranging from Moffat's best episode to his greatest contribution to Doctor Who canon, as well as Capaldi's greatest performance and his most stirring speech as the Doctor.

Cast your votes below then click through for the next poll...

Steven Moffat's best Doctor Who character