Colombo 7x5 Direct

Mason discovers that Hunter had an affair with Mason's late wife.

Columbo eventually realizes "Rosebud" is the trigger word and uses it to trap Mason into admitting the dogs were trained as weapons.

Mason invites Hunter to his home while he is allegedly at a clinic. He calls his own house and engages Hunter in a conversation about a film. When he says the word "Rosebud," the dogs brutally attack Hunter, making it look like a tragic accident caused by aggressive pets. Colombo 7x5

Mason trains his two Doberman Pinschers, Laurel and Hardy, to attack and kill anyone who hears the telephone "command" word: "Rosebud" . Plot Summary

Columbo tracks the timing of the phone calls. Mason discovers that Hunter had an affair with

Dr. Charles Hunter, Mason's best friend and colleague.

The dogs are actually friendly, which makes their sudden aggression toward a familiar friend suspicious. He calls his own house and engages Hunter

In classic fashion, Lieutenant Columbo (Peter Falk) notices small, seemingly insignificant details that don't add up: