- John Beal
- Dr. Ralph Sawyer
- Florence Rice
- Diana Wayne
- Edward Norris
- Dr. Frank Blake
- Ward Bond
- Barney Millen
- Douglas Fowley
- Joe Grant
- Grady Sutton
- Dr. Peter Piper
- Bill Shirley
- Tom Wayne
- Joseph Crehan
- Judge Hoskins
- Paul Porcasi
- Montez
- Russell Hicks
- Superintendent Duff
- Howard Hickman
- Dr. Watkins
- Gordon Armitage
- Doctor
- Al Bain
- Hood
- Steve Benton
- Detective
- Arthur Berkeley
- Trial Spectator
- Lucile Browne
- Nurse
- Stephen Chase
- Attorney for the Prosecution
- Martin Cichy
- Hood
- Mary Currier
- Dr. Blake's Receptionist
- Helen Dickson
- Trial Spectator
- John Dilson
- Chapman
- Donna Duda
- Patient
- Pearl Early
- Patient
- Jay Eaton
- Club Patron
- Calvin Ellison
- Undetermined Secondary Role
- Betty Farrington
- Mrs. Covington
- Tom Ferrandini
- Nightclub Patron
- William Forrest
- Assistant District Attorney
- Joel Friedkin
- Mule Owner
- Gladys Gale
- Patient
- June Gittelson
- Patient
- Dick Gordon
- Attorney
- John Long
- Undetermined Secondary Role
- John Marlin
- Pedestrian
- Thomas Martin
- Waiter
- Mathew McCue
- Trial Spectator
- Eva McKenzie
- Seymour's Mother
- Edward McWade
- Philip Cooper - Pharmacist
- John 'Skins' Miller
- Bob - Counterman
- Frances Morris
- Nurse
- James C. Morton
- Cop
- Wendell Niles
- Radio Announcer
- Wedgwood Nowell
- Attorney
- Foster H. Phinney
- Trial Spectator
- Purnell Pratt
- Dr. Watkins
- Jack Raymond
- Punchy Pugalist
- Jack Roper
- Punchy Pugalist
- John Sheehan
- Delivery Man
- Sammy Stein
- Hood
- Glenn Stokes
- Undetermined Secondary Role
- Harry Strang
- Police Officer
- Ernest Tobey
- Kid in Courtroom Corridor
- Emmett Vogan
- Defense Attorney
- Harry Wilson
- Hood
