Cast & crew
Black Friday (1940)
Directed by Arthur Lubin Written by Curt Siodmak, Eric Taylor
Cast
| Boris Karloff | Dr. Ernest Sovac |
| Stanley Ridges | Prof. George Kingsley / Red Cannon |
| Bela Lugosi | Eric Marnay |
| Anne Nagel | Sunny Rogers |
| Anne Gwynne | Jean Sovac |
| Edmund MacDonald | Frank Miller |
| Virginia Brissac | Mrs. Margaret Kingsley |
| Paul Fix | William Kane |
| Murray Alper | Bellhop |
| Jack Mulhall | Bartender |
| Jessie Arnold | Nurse |
| Raymond Bailey | Louis Devore |
| Joe King | Chief of Police |
| John Kelly | Taxi Driver |
| Kernan Cripps | Detective |
| Elfriede Borodin | 2nd Nurse |
| Tommy Conlon | Student |
| Franco Corsaro | Club Maitre d' (uncredited) |
| James Craig | Reporter Ernst Gives Notes To |
| Eddie Dunn | Det. Farnow |
| Harry Hayden | Prison Doctor |
| Edward Earle | Detective |
| Frank Jaquet | Fat Man in Bar |
| Ellen Lowe | Midtown Hotel Maid |
| Jerry Marlowe | Midtown Hotel Clerk |
| Jerry Marlowe | Cabbie |
| Wallace Reid Jr. | Student |
| William Ruhl | G-Man |
| Frank Sheridan | Prison Chaplain |
| Harry Tenbrook | Cabbie |
| Edwin Stanley | Dr. Warner |
| Emmett Vogan | Det. Carpenter |
| Russell Wade | Student |
| Victor Zimmerman | G-Man |
| Robert Morgan | Hotel Associate |
| Dave Willock | Student |
Crew
| Arthur Lubin | Director |
| Curt Siodmak | Screenplay |
| Elwood Bredell | Director of Photography |
| Frank Skinner | Original Music Composer |
| Eric Taylor | Screenplay |
| Philip Cahn | Editor |
| Burt Kelly | Associate Producer |
| Vera West | Costume Design |
| Jack Otterson | Art Direction |
| Charles Carroll | Sound |
| Hans J. Salter | Music Director |
| Jack Pierce | Makeup Artist |