Roger Kingsley
Mary Webb
Johnny Gregg
Lt. Fenton
Detective Chief Brownell
Detective Sergeant Quinn
Mr. Markewell
Hal Speel
Peggy Speel
Maggie, the elderly accomplice
Detective Lieutenant Cobb, with pipe
Narrator (voice)
Mr. Sheridan
Store Detective Walsh
Charlie (as Charlie Collins)
Gertrude Palmer
Frank Palmer
Joey Ridgway
Allen Ridgeway
William Pope
Braddock's Nurse