A string of robberies targeting pharmacies and medical supply firms sets Los Angeles on edge. When informant Benny Trounsel is found dead with cryptic clues linking him to the narcotics racket, Sergeant Joe Friday and Ben Romero must crack the case. From a trail of stolen morphine to a deadly confrontation, the detectives navigate betrayal and danger to uncover the mastermind behind the operation. Originally aired: August 4, 1949.

Cast:
Jack Webb, Barton Yarborough, Raymond Burr, Virginia Gregg, Harry Bartell