San Quentin's new warden crusades for reform and for a framed inmate who loves a nurse.
| Actor | Role |
|---|---|
 Louis HaywardEdward 'Romeo' Harper | Edward 'Romeo' Harper |
 Joanne DruAnne Halsey | Anne Halsey |
 Paul KellyWarden Clinton T. Duffy | Warden Clinton T. Duffy |
 Maureen O'SullivanGladys Duffy | Gladys Duffy |
 George MacreadyJohn C. Winant | John C. Winant |
 Horace McMahonPierson | Pierson |
 Irving BaconDoc Sorin | Doc Sorin |
 Joel FluellenBill Lake | Bill Lake |
 Joe TurkelFrank Roberts | Frank Roberts |
 Jonathan HaleBoyd | Boyd |
 George BarrowsConvict | Convict |
 Marshall BradfordLowell | Lowell |
 Peter BroccoNealy (uncredited) | Nealy (uncredited) |
| GGeorge BruggemanConvict | Convict |
| JJames ConatyPrison Board Member (uncredited) | Prison Board Member (uncredited) |
| RRudy GermaneConvict | Convict |
 Stuart HolmesJudge | Judge |
| JJohn IndrisanoConvict in Hospital Ward | Convict in Hospital Ward |
 Pete KellettConvict | Convict |
 DeForest KelleyEddie Lee | Eddie Lee |
 Frank MillsConvict (uncredited) | Convict (uncredited) |
 Joseph C. NarcisseConvict | Convict |
 Joey RayPrison Guard | Prison Guard |
| BBert StevensWhitley | Whitley |
| BBrick SullivanGuard | Guard |
 Harry WilsonLou | Lou |
 Michael McHalePinto | Pinto |