At the end of the episode when we see Emma Lazarus's stalker with a box, which we know contains her head, he's sitting on a plane back to America and is told to put the box in the overhead compartment. Even given this was before the major security enhancements, all hand luggage was still x-rayed. It would take a particularly terrible security officer not to spot a severed head in a box!
Jonathan [ to Adam ]: Whatever time did we get back last night? Last thing I remember we were in that nightclub watching a girl singing selections from Verdi's Nabucco while two men from the audience removed her G-string with their teeth. Thought you were never going to shake the old slapper off the way she was all over you like a rash the rest of the ni...
(The sound of a woman's voice singing Va, pensiero badly emanates from the bathroom.)
Jonathan [ on the 'phone to Maddy ]: Do me a favour. I grew out of vanishing skeletons before I was into long trousers. If you're going to kill someone on Hallowe'en, you'd think they'd come up with something more original than that. He's probably not even a real vicar; he's probably wearing rubber underwear. Whatever you do, if he asks you to pray, don't kneel in front of him with your eyes closed.
Maddy [ in the kitchen with Rev. Claythorne ]: Right. Several intriguing features. I thought so.
Maddy [ to Rev. Claythorne ]: While I'm in the shower, if you fancy a nibble… Be my guest.
(Claythorne looks suitably shocked.)
The garage that forms an integral part of the story was built specially for the episode from Cotswold stone and then demolished once filming was complete.
The distorted voice heard when the skeleton is on the landing with the body over its shoulder is actually that of the writer, David Renwick, himself.
Stuart Milligan takes over the role of Adam Klaus. Anthony Head was forced to step out when 'Buffy the Vampire Slayer' was green-lighted for a full-length second season.
The title of this episode is also the name of the show's Theme Tune