 Susan HaywardBarbara Graham | Barbara Graham |
 Simon OaklandEdward S. 'Ed' Montgomery | Edward S. 'Ed' Montgomery |
 Virginia VincentPeg | Peg |
 Theodore BikelCarl G.G. Palmberg | Carl G.G. Palmberg |
 Wesley LauHenry L. Graham | Henry L. Graham |
 Philip CoolidgeEmmett Perkins | Emmett Perkins |
 Lou KrugmanJohn R. 'Jack' Santo | John R. 'Jack' Santo |
 James PhilbrookBruce King | Bruce King |
 Bartlett RobinsonDistrict Attorney Milton | District Attorney Milton |
 Gage ClarkeAttorney Richard G. Tibrow | Attorney Richard G. Tibrow |
 Joe De SantisAl Matthews | Al Matthews |
 John MarleyFather Devers | Father Devers |
 Raymond BaileySan Quentin Warden | San Quentin Warden |
 Gertrude FlynnSan Quentin Matron | San Quentin Matron |
 Russell ThorsonSan Quentin Sgt. | San Quentin Sgt. |
 Dabbs GreerSan Quentin Capt. | San Quentin Capt. |
 Stafford ReppPolice Sgt. | Police Sgt. |
 Gavin MacLeodPolice Lt. | Police Lt. |
 Alice BackesBarbara, San Quentin Nurse | Barbara, San Quentin Nurse |
 Wendell HolmesDetective | Detective |
 Gerry MulliganJazz Combo Member | Jazz Combo Member |
 Shelly ManneJazz Combo Member | Jazz Combo Member |
| AArt FarmerJazz Combo Member | Jazz Combo Member |
| FFrank RosolinoJazz Combo Member | Jazz Combo Member |
| PPete JollyJazz Combo Member | Jazz Combo Member |
| BBud ShankJazz Combo Member | Jazz Combo Member |
 John GeorgeCourtroom Spectator (uncredited) | Courtroom Spectator (uncredited) |
| JJohn BartonClerk (uncredited) | Clerk (uncredited) |
| LLeonard BellSan Francisco Hood (uncredited) | San Francisco Hood (uncredited) |
 Olive BlakeneyCorona Warden (uncredited) | Corona Warden (uncredited) |
