In this episode, Hathaway contacts The Royal Canadian Mounted Police (RCMP) about Simon Monkford's time in Toronto. The RCMP do not have jurisdiction in Toronto: it should have been the Toronto Police Service.
Innocent: There's only one reliable way to find out about any relationship: test it to destruction.
Lewis: What is that?
Hathaway: Tonic water on the rocks with a slice of lemon.
Lewis [ astounded ]: Tonic water?
Hathaway: Mm. I'm detoxing, and tonic water on the rocks is one of the preferred drinks of recovering alcoholics. Plus, it gives one a sort of spurious glamour.
Lewis: I'll bear that in mind, in case I ever need any spurious glamour.
(Professor Gregson apologizes to Emma for attending the preview.)
Denise Gregson: This is my only window. I'm singing madrigals tonight, and I can't be at your first night proper because I'm chairing a debate on Molière. The punishment for some sin I have no recollection of committing.
Lewis: We've got a double murder on our hands; you're messing about with some two-bit con man.
Hathaway: Yeah, but I feel there's something more. "By the pricking of my thumbs… "
Lewis: Don't tell me, Shakespeare.
Lewis: I'm getting sick of bloody Shakespeare!
Hathaway quotes the Second Witch in Shakespeare's Macbeth, Act IV, Scene I, whose premonition — "Something wicked this way comes" — heralds Macbeth's arrival to demand a second prophecy.
Hathaway [ to the RMCP ]: No, no we never sleep and we always get our man, except when it's a woman or even an occasional transsexual.
Hathaway is having a bit of fun at the Canadians' expense. One of the mounties' well-known slogans is 'We always get our man.'
Isabel Dawson [ as Portia ]: " …The quality of mercy is not strain'd, it droppeth as the gentle rain from heaven upon the place beneath: 'tis twice bless'd; it blesseth him that gives and him that takes: 'tis mightiest in the mightiest; it becomes the throned… "
The lines that open this episode, and from whence its title is derived, are from Shakespeare's Merchant of Venice, Act IV, Scene I, in which Portia as Balthazar argues for a cash settlement of Antonio's debt rather than Shylock's preferred pound of flesh.