Tyrion: Tell me, Lady Stark, when was the last time you saw your sister?
Catelyn: Five years ago.
Tyrion: She's changed. She was always a bit touched, but now, you might as well kill me here.
Catelyn: I am not a murderer Lannister.
Tyrion: Neither am I! I had nothing to do with the attempt on your son's life....What sort of an imbecile arms an assassin with his own blade?