There's a great deal of chemistry between Cal Lightman and Gillian Foster, a member of his team.
She's recently divorced and a gifted psychologist. To determine the truth, Gillian focuses on voice, words, and psychology, tools Lightman needs for insight into human behavior.
Cal: What's your content analysis of the mother?
Gillian: She was definitely concealing something. When I asked her about Miss McCartney, she started referring to her as 'that woman'.
Cal: As in, 'I did not have sexual relations with that woman, Miss Lewinsky'
Gillian: Do you still have that note, that I brought you? I want it for my office.
Cal: (handing over the note) You really are a pack rat.
Gillian: You could have just told me what this was for.
Cal: No. You're a terrible liar.
Gillian: Normal people think that's a good thing.