- DS Jane 'Panhandle' Penhaligon: You can spot a guilty cop in a football crowd and not notice World War 3 in your living room.
- Dr. Eddie 'Fitz' Fitzgerald: [Sarcastically] Oh, you've seen my living room.
- [Mark walks in on Fitz and a naked Penhaligon in Fitz's bedroom]
- Dr. Eddie 'Fitz' Fitzgerald: We never did have that little chat, did we?
- [Mark throws a paper at Fitz and storms into a bathroom. Fitz follows him]
- Dr. Eddie 'Fitz' Fitzgerald: Look, I'm sorry.
- Mark Fitzgerald: Does Mum know?
- Dr. Eddie 'Fitz' Fitzgerald: No, not yet. Your mother left me, if you don't remember.
- Mark Fitzgerald: Eh? No, she didn't! She didn't leave! You drove her away 'cuz you're... cuz you're a dickhead!
- Dr. Eddie 'Fitz' Fitzgerald: Well, that's a fair summary of the facts, probably.
- Mark Fitzgerald: And I'm older than her!
- Dr. Eddie 'Fitz' Fitzgerald: Hardly! What do you expect me to do? Spend the rest of my life like Cliff bloody Richards?
- Dr. Eddie 'Fitz' Fitzgerald: [talking to his father-in-law on the phone] A case for patricide in a nutshell!
- Dr. Eddie 'Fitz' Fitzgerald: You're kind of like a doctor, aren't you?
- DS Jimmy Beck: You've lost me.
- Dr. Eddie 'Fitz' Fitzgerald: You tend to bury your mistakes.
- D.C.I. Charlie Wise: Are you infallible?
- Dr. Eddie 'Fitz' Fitzgerald: Yes, the other guy's an impostor.
- Norma Trant: [to Fitz] Tell me, doctor, is a man happier who acts on his instincts or represses them?
- Dr. Eddie 'Fitz' Fitzgerald: You're not a good man, Michael; you're not a bad man. You're somewhere in between just like the rest of us. Go on. Admit it! Admit to that chocolate bar underneath your pillow.
- D.C.I. Charlie Wise: Fitz, are they your own teeth?
- Dr. Eddie 'Fitz' Fitzgerald: Yeah.
- D.C.I. Charlie Wise: Well, look after them, floss them and clean them, and don't ever call me "thick" again.
- [Dean almost looks at Beck through his fingers again]
- DS Jimmy Beck: Do that one more bloody time and I'll chop them off!