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"Testimony of Evil (Dead Men Don't Laugh)" is the sixth and final episode of the short-lived TV series Police Squad!. The episode was directed by Joe Dante and written by Tino Insana and Robert Wuhl. The episode was produced by Robert K. Weiss.

A struggling comedian (played by Danny Dayton) owes money to the owner of a nightclub. Following the discovery of the comedian's body at the bottom of a cliff in a car crash, it is initially believed that said accident was a suicide. However, it is later discovered that the comedian was also a police informant on a drug ring he infiltrated at his nightclub. Frank (Leslie Nielsen) intervenes and takes the place of the deceased at the nightclub in order to investigate further.

• Tonight's special guest star: William Conrad, who (like Lorne Greene in the first episode) portrays a man who is thrown out of a moving car with a knife in his chest.
• Next week's experiment: Why cows look forward to giving milk.
• Johnny's next customer: Dick Clark, who wants help understanding a new type of music (ska) before asking for some more of Johnny's "secret formula youth cream".
• Freeze frame gag: The office falls apart around Frank, Ed, and Norberg.

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• "Testimony of Evil" at IMDb