| Ed Brady | Worker Throwing Stone (uncredited) |
| Sonny Bupp | Hit-and-Run Victim (uncredited) |
| William Burress | Charlie Gaunt (uncredited) |
| Ralph Byrd | Police Lab Technician (uncredited) |
| Eddy Chandler | Prison Guard Sergeant (uncredited) |
| Wallis Clark | Dr. Hedges (uncredited) |
| Frank Fanning | Guard in Visitor's Room (uncredited) |
| Jim Farley | Police Officer Johnson (uncredited) |
| Jerry Fletcher | Reporter (uncredited) |
| Eddie Hart | Police Driver (uncredited) |
| Dell Henderson | Blake's Associate (uncredited) |
| Oscar 'Dutch' Hendrian | Convict (uncredited) |
| Al Herman | Reporter (uncredited) |
| Russell Hicks | District Attorney Knight (uncredited) |
| Arthur Hoyt | Governor's Secretary (uncredited) |
| Edward Keane | Ed Stanley (uncredited) |
| Donald Kerr | Agitated Citizen at Shoeshine Stand (uncredited) |
| Edward LeSaint | Judge (uncredited) |
| Wilfred Lucas | Prison Yard Captain (uncredited) |
| Frank Marlowe | Prison Lab Technician (uncredited) |
| Tom McGuire | Death-Row Captain Harris (uncredited) |
| Bruce Mitchell | Prison Guard with Machine Gun (uncredited) |
| Philip Morris | Guard Escorting Kwong to Gallows (uncredited) |
| Jack Perry | Convict Making Noise with Cup (uncredited) |
| George H. Reed | Black Convict (uncredited) |
| Larry Steers | Man in District Attorney's Office (uncredited) |
| Charles Sullivan | Cell Block E Convict (uncredited) |
| Richard Tucker | Defense Attorney (uncredited) |
| Monte Vandergrift | Plainclothesman Finding Gun (uncredited) |
| Sailor Vincent | Convict (uncredited) |
| Emmett Vogan | Prison Lieutenant (uncredited) |
| Max Wagner | Cell Block E Convict (uncredited) |
| Ethel Wales | Travel Bureau Customer (uncredited) |
| Walter Walker | The Governor (uncredited) |
| Bryant Washburn | Martin Blake (uncredited) |
