Episode #1.8 - S1-E8
Other mistake: A mysterious character breaks into Nadia's house after the police left. He does it by literally punching a hole in the door and reaching for the keys that are in the keyhole, inside. How did the police close the door when they left, if keys are still inside?
Continuity mistake: When Aunt Mary is writing on the whiteboard at the hospital, the word "killed" changes style between shots. (00:31:40)
DI Humphrey Goodman: If I am gonna woo the ladies with my culinary skills, I think I need to invest in a cookery book.
DS Florence Cassell: I don't know. Maybe turning on the oven would be a good start.
DI Humphrey Goodman: Yes. The devil is in the detail. (00:24:50)
Question: Why did the cord on the wall phone in the police station change from straight in the early episodes to coiled later?
Answer: There's probably no particular reason. Sets and props on long-running TV shows often change as needed and for various reasons throughout a series run.
raywest ★