Dragnet - Season 4 - Eps 6: Juvenile - The Little Pusher
Joe and Bill are working Juvenile Narcotics Division and find a 12 year old under the influence of narcotics. They go to the boy’s school and conduct a class for teachers on how to identify narcotics. They discover that a ninth grader is selling the narcotics in school and find that his father is the source of the drugs.
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