 Richard BasehartRoy Martin / Roy Morgan | Roy Martin / Roy Morgan |
 Scott BradyPolice Sgt. Marty Brennan | Police Sgt. Marty Brennan |
 Roy RobertsPolice Captain Breen | Police Captain Breen |
 Whit BissellPaul Reeves | Paul Reeves |
 James CardwellPolice Sgt. Chuck Jones | Police Sgt. Chuck Jones |
 Jack WebbLee Whitey | Lee Whitey |
 Reed HadleyNarrator (voice) (uncredited) | Narrator (voice) (uncredited) |
 Frank CadyPete Hammond | Pete Hammond |
 Dorothy AdamsMilk Customer | Milk Customer |
 Jane AdamsNurse Scanion (uncredited) | Nurse Scanion (uncredited) |
 Jack BaileyWitness in Pajamas and Robe (uncredited) | Witness in Pajamas and Robe (uncredited) |
| AAlma BeltranMiss Montalvo (uncredited) | Miss Montalvo (uncredited) |
 Robert BiceDetective with Capt. Breen (uncredited) | Detective with Capt. Breen (uncredited) |
| DDolores CastelliWitness (uncredited) | Witness (uncredited) |
| GGeorge ChanChinese Suspect (uncredited) | Chinese Suspect (uncredited) |
 Garrett CraigPatrolman (uncredited) | Patrolman (uncredited) |
 John DehnerAssistant Bureau Chief (uncredited) | Assistant Bureau Chief (uncredited) |
 Ann DoranDispatcher (uncredited) | Dispatcher (uncredited) |
 Rex DowningYoung Hoodlum (uncredited) | Young Hoodlum (uncredited) |
| MMichael DuganPatrolman (uncredited) | Patrolman (uncredited) |
 Paul FierroSpanish-Speaking Detective (uncredited) | Spanish-Speaking Detective (uncredited) |
 Byron FoulgerFreddie (uncredited) | Freddie (uncredited) |
| KKay GarrettDoctor (uncredited) | Doctor (uncredited) |
| TTim GrahamUniformed Sergeant (uncredited) | Uniformed Sergeant (uncredited) |
 Kit GuardSuspect (uncredited) | Suspect (uncredited) |
 Harry HarveyLiquor Store Proprietor (uncredited) | Liquor Store Proprietor (uncredited) |
 Thomas Browne HenryDunning (uncredited) | Dunning (uncredited) |
| PPeter HobbesMilkman (uncredited) | Milkman (uncredited) |
 Virginia HunterMiss Smith (uncredited) | Miss Smith (uncredited) |
| FFelice IngersollRecords Clerk (uncredited) | Records Clerk (uncredited) |
