Episode #3.6 - S3-E6
Continuity mistake: Having (more) beers with Captain Jack at the end of the episode, Dwayne tells him "You've been like a cat on a hot tin roof"; a woman wearing a blue dress walks past them. Seconds later in the convo, in a close-up Paul Barber asks "Which you?" and the same woman is passing again, and with her two guys in green and purple from a previous shot. (00:49:25)
Episode #3.6 - S3-E6
Continuity mistake: When Captain Jack tells Dwayne"They didn't make it" before the Monty Python quote-a-thon, the bottles in front of them rotated between shots. (00:50:45)
Episode #3.6 - S3-E6
Continuity mistake: There's a rather burly woman with short blonde hair and a pink dress in the very last shot of the episode. She is an extra that keeps popping around in the ending scene at different times (before Dwayne's hot tin roof line, and during Catherine's magical angry bird memory). (00:51:35)
Episode #3.6 - S3-E6
Factual error: Humphrey and the rest of the crew arrive on the murder scene, where Fidel is taking pictures of the body. With the knife fully planted inside the victim and pictures still to be taken, Fidel is already able to say that the knife has been wiped clean of prints; it's impossible that he could have already done such an assessment at that point.
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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