Dragnet - The Big Man pt.1

Detective Joe Friday works undercover in the Narcotics Bureau to infiltrate a drug trafficking operation. Over several months, Friday gains the trust of a local gang, with the ultimate goal of reaching high-level drug dealers Ralph Costello and Arthur Belmont. Through careful manipulation, Friday successfully infiltrates the gang, makes small drug purchases, and eventually arranges a meeting with Tony Morse, who leads to Costello.