Dragnet - Season 4 - Eps 3: S.I.U. - The Ring
Joe and Bill are working the Special Investigation Unit. Informant “Black 10” asks for a meeting with Joe and Bill and gives them a tip about a bartender who is fencing stolen jade ring. Joe and Bill set up a sting to recover the ring and other stolen jewelry.
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