Mark Gatiss: A Study in Sherlock

Mark Gatiss, who co-created "Sherlock" and plays Mycroft Holmes, discusses the show with Benedict Cumberbatch, Martin Freeman, and others in the cast.

• Nathan LandegDirector

• Mark GatissHimself
• Benedict CumberbatchHimself
• Martin FreemanHimself
• Una StubbsHerself
• Rupert GravesHimself
• Steven MoffatHimself