 Chester MorrisBoston Blackie | Boston Blackie |
 Adele MaraEve Sanders | Eve Sanders |
 Richard LaneInspector Farraday | Inspector Farraday |
 George E. StoneThe Runt | The Runt |
 Lloyd CorriganArthur Manleder | Arthur Manleder |
 Walter SandeDetective Mathews | Detective Mathews |
 Larry ParksJoe Trilby | Joe Trilby |
 George McKayRoggi McKay | Roggi McKay |
 Cy KendallJumbo Madigan | Jumbo Madigan |
 Paul FixSteve Caveroni | Steve Caveroni |
 Ben TaggartWarden | Warden |
 Ernie AdamsPop - Stage Doorman (uncredited) | Pop - Stage Doorman (uncredited) |
 Lloyd BridgesBus Driver (uncredited) | Bus Driver (uncredited) |
 Edmund CobbPolice Dispatcher Sergeant (uncredited) | Police Dispatcher Sergeant (uncredited) |
 Harry DeppMr. Jones - Hotel Desk Clerk (uncredited) | Mr. Jones - Hotel Desk Clerk (uncredited) |
| MMike DonovanPoliceman (uncredited) | Policeman (uncredited) |
 Lester DorrHenry - Desk Clerk (uncredited) | Henry - Desk Clerk (uncredited) |
 Bud GearyPoliceman (uncredited) | Policeman (uncredited) |
 Kit GuardTaxi Driver (uncredited) | Taxi Driver (uncredited) |
| DDave HarperPoliceman (uncredited) | Policeman (uncredited) |
| AAl HermanGuard (uncredited) | Guard (uncredited) |
| GGeorge HickmanElevator Boy (uncredited) | Elevator Boy (uncredited) |
| DDick JensenMartin - Driver of Squad Car 29 (uncredited) | Martin - Driver of Squad Car 29 (uncredited) |
| WWilliam LallyPoliceman (uncredited) | Policeman (uncredited) |
 Eddie LaughtonAmbulance Driver (uncredited) | Ambulance Driver (uncredited) |
| JJames T. MackBill - Manleder's Valet (uncredited) | Bill - Manleder's Valet (uncredited) |
| TTeddy MangeanSinging Telegram Boy #1 (uncredited) | Singing Telegram Boy #1 (uncredited) |
 Sidney MillerHerman - Bellhop (uncredited) | Herman - Bellhop (uncredited) |
 Eileen O'HearnHotel Maid (uncredited) | Hotel Maid (uncredited) |
| LLee PratherGuard Counting Guests (uncredited) | Guard Counting Guests (uncredited) |
