Continuity mistake: The underground car seen in the CCTV video is a different car design from the one where the heroes defuse the bomb (central line design vs another design). The rounded doors is the most visible proof.
John Watson: I just met a friend of yours.
Sherlock Holmes: A friend?
John Watson: An enemy.
Sherlock Holmes: Oh. Which one?
John Watson: Your arch-enemy, according to him. Do people have arch-enemies?
Sherlock Holmes: Did he offer you money to spy on me?
John Watson: Yes.
Sherlock Holmes: Did you take it?
John Watson: No...
Sherlock Holmes: Pity, we could have split the fee. Think it through next time.
Question: Which episode contains the line "I'm not insulting you, I'm describing you?" Google searches turn up nothing but the quote itself, and no further information on the episode or the rest of the scene. If anyone knows the line that led up to it, that would be even better.Captain Defenestrator