Mark Gatiss is an accomplished author, actor and playwright. Originally from Sedgefield, County Durham, he graduated from Bretton Hall Drama College with a BA (honors) in Theatre Arts.

He was one-quarter of the award-winning comedy team The League of Gentlemen (1999), and became heavily involved in the post-television Doctor Who (1963) scene, having written a variety of novels and audio plays, together with a string of short supernatural/science-fiction films (most of which he appeared in). He also co-wrote three sketches for BBC2's "Doctor Who Night" in November 1999.

When Doctor Who (2005) was re-imagined by Russell T. Davies and returned to television, Gatiss became part of the writing team. He had another major success as the co-creator of Sherlock (2010) for the BBC with Steven Moffat and also stars in the series as Mycroft Holmes. He has co-written plays for the Edinburgh Festival and appeared in a number of theatre and radio shows.