1. When he revealed how Sherlock survived the Reichenbach Falls.
2. Except not really.
Via bbc.co.uk
3. When he taught Jeremy Clarkson how to throw a punch.
4. When he revealed he knows about the fanfic.
Via bbc.co.uk
5. And is aware of how fanfic writers get their ideas.
Via bbc.co.uk
6. When he made these faces.
7. Oh, and this face.
8. When he said this.
9. Which then led to this.
10. And, of course, this photoshoot.

Watch the full episode on iPlayer now.