Revealing mistake: The guy who plays Clive in this episode has one of the most appalling accents I have heard. He's apparently from Manchester, but sounds like a sort of cockney South African. His accent slips around all the time; it's very poor. I wouldn't normally submit it, but his is so shockingly bad I doubt anyone would be fooled into thinking he was British.David Mercier
Other mistake: When the power outage occurs, Daphne claims she can't cook the steaks, however, the cook top in the kitchen is gas. They have matches as shown by them lighting the hurricane lamps.goofyfoot
Factual error: At the cafe, the employee says that Niles' credit card was declined at the register because "cancelled by order of co-signatory." A co-signatory shouldn't be able to cancel the card without the other person.