This was one of my favorite scenes of this whole series.
Sherlock | The Reichenbach Fall
Molly: You’re a bit like my dad. He’s dead- no, sorry. Sherlock: Molly, please don’t feel the need to make conversation. It’s really not your area. Molly: When he was dying, he was always cheerful. He was lovely - except when he thought no one could see. I saw him once. He looked - sad. Sherlock: Molly. Molly: You look sad, when you think he can’t see you. [pause] You okay? Don’t just say you are, because I know what that means, looking sad when you think no one can see you. Sherlock: You can see me. Molly: I don’t count.