- Preston Foster
- Bill Crane - Private Detective
- Frank Jenks
- Doc Williams
- Carol Hughes
- Emily Lou Martin
- Barbara Pepper
- Agatha Hogan
- Astrid Allwyn
- Miss Brentino
- Clarence Wilson
- Charles Frazee
- Theodore von Eltz
- Robert Westland
- George Meeker
- Richard Bolston
- Russell Hicks
- Mr. Woodbury
- Selmer Jackson
- The Warden
- Rollo Lloyd
- Amos Sprague
- Thomas E. Jackson
- Detective Lt. Strom
- Arthur Hoyt
- Dr. Shuttle
- Bryant Washburn
- State Attorney Ross
- Alice Belcher
- Aunt Mary
- Ward Bond
- Connors - Death-Row Inmate
- Don Brodie
- Taxi Driver
- Herbert Evans
- Simmons - Butler
- Henry Hall
- Major Lee - Ballistics Expert
- Stephanie Howard
- June Day - Maid
- Eddie Kane
- Joe Petro
- Alexander Leftwich
- Mr. Wayne - Apartment House Superintendent
- Ben Lewis
- Havemeyer
- Wilfred Lucas
- Gun Dealer
- Charles Murphy
- Mr. Washington, - Bookkeeper
- Tom Quinn
- Mannie Grant
- Edna Salee
- Mannie's Girl Friend
- Charles Sullivan
- Guard
