Adam-12 - Season 3 - Eps 19: Log 165: Once a Cop
Malloy and Reed are on patrol, and find a homeless man stabbed. They take a retired policeman, Jack Donohoe (who lives nearby), in for questioning, but he is released when the real suspect is found. Donohoe later gets involved in a shootout with a robbery suspect. Other incidents include an aspiring actress from Missouri shooting up a phone booth at Union Station after being lured by a theatrical agent who promised a movie career and took her money, and then having her suitcase, containing a rattlesnake, stolen at the station.
About Adam-12

Title: Adam-12
First Air Date: 1968-09-21
Last Air Date: 1975-05-20
Status: Ended
Rating: 7.1/10 (from 39 votes)
Language: EN
Seasons: 7
Total Episodes: 174
Network: NBC
Genres: Crime, Drama
Production Companies: Mark VII Ltd., Universal Television Entertainment
Synopsis
Adam-12 is a television police drama that followed two police officers of the Los Angeles Police Department, Pete Malloy and Jim Reed, as they patrolled the streets of Los Angeles in their patrol unit, 1-Adam-12.
Cast

Martin Milner
Officer Pete Malloy

Kent McCord
Officer Jim Reed

William Boyett
Sergeant MacDonald