Goof - Anachronsim: Marple: (To the taxi driver) The train station, not the police station, please.
There's no way Miss Marple would have used this expression in the late 1940s or 50s; the expression has only been in common use for the last three or four years. The term is "railway station".
Miss Marple: Old men can sometimes become too sentimental around children.
Dr. Waters: Really? I find myself becoming less tolerant.
Tuppence:(Referring to Ada Beresford) She made the Philistines look like the Chelsea Arts Club.
Miss Marple: (After Tuppence has stalled the car twice) Kangaroo petrol?
Tuppence: Mrs Lancaster said that there was a child buried behind the fireplace in the sun lounge.
Miss Packard: My sun lounge?
Mrs Lancaster: Excuse me, it wasn't your poor child?
Tuppence: No I don't think so.
Mrs Lancaster: I thought you'd come for a reason. Someone will come sometime. That's where the poor child was you know. The poor child behind the fireplace.
Ada Beresford: The United Nations building in New York. What's it like?
Tommy: I haven't been.
Ada Beresford: You haven't been?!
Tommy Beresford: [Tuppence asks Tommy to drive so she can continue reading her copy of Macbeth. Tommy chuckles in response] I was in Macbeth at my prep school. "Tomorrow, and tomorrow, and tomorrow creeps in this petty pace from day to day."
Tuppence Beresford: I heard you were marvelous.
Tommy Beresford: Who from?
Tuppence Beresford: You.
Lily Waters - Poisoned
Aunt Ada - Poisoned
Nellie Bligh - Poisoned
Miss Marple did not appear in the original novel on which this adaptation is based. To make this story part of the Marple series, it is set in the post-war period, meaning Tommy would still be needed in military intelligence.
By The Pricking Of My Thumbs was split into two parts in the US and aired on June 18th and 25th.
This episode is based on a Tommy and Tuppence novel by the same name, also by Agatha Christie, published in 1968.
Title: By The Pricking Of My Thumbs
This is a quote from Shakespeare's Macbeth. It is said by the second witch in Act 1 Scene 4:
By the pricking of my thumbs,
Something wicked this way comes.