Season 4

01 An Exercise in Fatality Episode 115th September 1974 A health club owner kills his partner who is about to uncover a fraud and makes it look like an accident 02 Negative Reaction Episode 215th October 1974 Brilliant photographer Paul Galesko plans to murder his domineering wife, Frances, and pin the crime on an ex-convict named Alvin Deschler. His plan is to make it look as if Alvin kidnapped his wife and killed her before picking up the ransom money. 03 By Dawn's Early Light Episode 327th October 1974 The head of a military school kills one of the governors by sabotaging the gun which is used on founders day. 04 Troubled Waters Episode 49th February 1975 While holidaying on board a cruise liner, Columbo helps capture the killer of the singer with the ship's band. 05 Playback Episode 52nd March 1975 An inventor video tapes his mother-in-law's death, and then replays it back to the security guard, to give himself an alibi. 06 A Deadly State of Mind Episode 627th April 1975 A doctor kills the husband of the woman he is having an affair with but is seen leaving the house by a witness who is happens to be blind.