Cherche Le Phantom

The Commissioner gives the Inspector a choice of two different assignments. One is the case of the missing gorilla, and the other is the mysterious phantom who's been haunting the Paris Opera House. The Inspector goes to the opera to find the phantom. The curtain falls, the trap door opens and the lights go out. As the spotlight chases him across the stage, the phantom swings from above and hits the Inspector with a sandbag. The phantom escapes into the Paris Zoo, where the Inspector ends up in a cage with the gorilla. It turns out that the phantom is actually the missing gorilla, who goes "ape" over opera music.

The Inspector, The Chief, Sergeant Deudeux, Gorilla