Dragnet - Season 4 - Eps 22: D.H.Q. - Night School
Joe is enrolled in night school and busts a classmate for possession of marijuana. The professor threatens to give Joe an F for the bust. He puts removing Joe up for a vote by the class. An unexpected classmate comes to Joe's aid.
About Dragnet

Title: Dragnet
First Air Date: 1967-01-12
Last Air Date: 1970-04-16
Status: Ended
Rating: 6.9/10 (from 15 votes)
Language: EN
Seasons: 5
Total Episodes: 98
Network: NBC
Genres: Crime, Drama, Mystery
Production Companies: Universal Television, Dragnet Productions, Mark VII Ltd.
Synopsis
Police Detective Sgt. Joe Friday and his partners investigate crimes in Los Angeles.
Cast

Harry Morgan
Officer Bill Gannon

Jack Webb
Sergeant Joe Friday