Murder on the Honore Express - S8-E1
Continuity mistake: When Florence pulls up next to D.I. Jack Mooney, every time the camera is directly on her, she has a seatbelt on. Every time the camera pans to the mirror reflection of her, she doesn't. (00:32:00)
Beyond the Shining Sea: Part One - S8-E5
Continuity mistake: The video played on the mobile where Tiana is shown leaving on the boat shows her wave with her right arm. In the previous scene she waved from the boat with her left arm. (00:03:26 - 00:07:52)
Murder on the Airwaves - S8-E7
Continuity mistake: When the DJ is handed the LP at the start the way it's held changes position between takes. (00:02:35)
Continuity mistake: When we see Harry on the laptop, he runs off and the laptop switches from on to off.
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.
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