Why He Should: Gatiss and Moffat are the only two writers currently writing for Doctor Who who were around for the first season of the shows revamp. A self-proclaimed massive Whovian, Gatiss has written several episodes over the shows eight series run, including the wonderfully realised TV movie An Adventure in Space and Time, which aired as part of the shows 50th anniversary celebrations last year. He also co-showruns Sherlockwith Moffat, so it would make sense that Moffat would want to hand the show over to a friend, and Gatiss extensive experience writing for the show would instill some confidence in his showrunning ability. Why He Shouldnt: For as much as Gatiss has written for Doctor Who, he has yet to churn out an objectively great episode. If Series 8's Robot of Sherwood is an indication of anything, its that Gatiss prefers pulpy storytelling with an emphasis on one-liners and gags, rather than telling stories of any real substance. Although his writing for both Doctor Who and Sherlockhas been consistently solid, Gatiss just doesnt seem to have the writing chops to sketch out an entire season-long arc and produce multiple quality episodes that this coveted showrunner role would demand of him. With that being said, keep on acting Mark! Game of Thronesis made ten times better with your presence.