Mark Gatiss, who co-created "Sherlock" and plays Mycroft Holmes, discusses the show with Benedict Cumberbatch, Martin Freeman, and others in the cast.
| Actor | Role |
|---|---|
 Mark GatissHimself | Himself |
 Benedict CumberbatchHimself | Himself |
 Martin FreemanHimself | Himself |
 Una StubbsHerself | Herself |
 Rupert GravesHimself | Himself |
 Steven MoffatHimself | Himself |