While Columbo is in the car with the corpse looking for evidence, the corpse is in the foreground. During the entire search you can see the guy is breathing.
saying he doesn't speak italian isn't neccesarily a goof. after all, you'd be surprised what people will say about you/ in front of you if they think you don't understand. a man as intelligent as columbo would certainly know enough to use that to his advantage.
In the previous show "Death Hits The Jackpot" Columbo can speak fluent Italian but, in this show he says he doesn't know Italian.
During the opening credits, camera cranes up, water fountain in the foreground, building in the background. The water in the fountain is flowing in reverse.
The football teams are Canadian from the CFL: the Saskatchewan Roughriders and the Edmonton Eskimos.
At the end of the episode where Columbo is doing his round-up, he shows his badge to Leon Lamarr. By freeze-framing, you can see that Columbo's first name is Frank.
The woman who was an accomplice after the fact, said she didn't know if the murderer had done it when she heard that the rock star was dead. How could she have been driving in his car with a mask of him on at the moment of the crime and not know he was murdering her, or at least committing an improper act.