Sherlock, Series 2

Molly Hooper:
You're a bit like my dad. He's dead. Oh, sorry...

Sherlock Holmes:
Molly, please don't feel the need to make conversation. It's really not your area.

Molly Hooper:
When he was dying, he was always cheerful. He was lovely. Except when he thought that no one could see. I saw him once. He looked sad.

Sherlock Holmes:
Molly...

Molly Hooper:
You look sad... when you think he [Watson] can't see you. Are 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 Holmes:
You can see me.

Molly Hooper:
I don't count. What I'm trying to say is that, if there's anything I can do, anything you need, anything at all, you can have me. (flustered) No, I just mean... I mean... if there's anything you need - it's fine.

Sherlock Holmes:
But what could I need from you?