Continuity mistake: During the interview with Maria, the Inspector's pants are torn when removing her file with a key on a chain, the Inspector's shirttail is exposed. When he walks back to his desk and calls his assistant on the intercom, the shirttail is no longer visible. When Hurcule returns after escorting Maria back to prison, the Inspector turns away from the window, and his shirttail is again exposed. (00:33:45 - 00:35:25)
Continuity mistake: During the interview with Maria, her headscarf disappears from Inspector Clouseau's desk. (00:34:28)
Continuity mistake: The balloons that Inspector Clouseau is carrying changes. For example, he has 3 yellow balloons when outside the prison but there are 4 yellow ones when the police van is driving down the street. (00:35:45)
Character mistake: When Clouseau and Ballon are playing billiards, and Clouseau accuses Ballon of murdering the chauffeur out of jealously, he accidentally refers to Ballon as "Inspector Ballon". (00:46:20)
Continuity mistake: At the beginning of the billiards game, Monsieur Ballon leans the "bridge cue" against the lamp. At the end of the game, when Clouseau is putting the cues away, it is leaning against the wall. (00:48:21)
Other mistake: Subtitle (English) appears to be incorrect: "He is setting the scions of criminal investigations back 1000 years" should be "He is setting the science of criminal investigations back 1000 years." "Scions" is a description of the branches of a tree. (01:11:00)
Factual error: Inspector Clouseau's watch may be broken but Hercule's doesn't keep very good time either. They synchonise watches at 7:47. 18 seconds later, Hercule says he has 7:47 and 23 seconds. (01:28:14)
Continuity mistake: When Clouseau is explaining how Maria got a bump on the head the yellow cushion on the sofa changes position. (01:33:57)
Continuity mistake: Clouseau gets his left foot stepped on by Dominique Ballon causing him to hop around holding his left leg. A shot later he's holding his right foot.
Other mistake: When Dreyfus crosses his arms, that position he does is impossible for him to have stabbed himself. He'd have had to raise his right arm up with the letter opener pointing directly towards the left side of his chest then thrust downward.
Other mistake: When Clouseau's in the nudist camp garden he's mostly dry. Somehow so is the guitar he was carrying when he fell into the pond.
Continuity mistake: Maria rips Clouseau's suit, and he tells her not to worry and starts pulling it back up. The shot cuts and it's back down again.
