Directed by
| Kurt Neumann | ||
Writing Credits
| Frederic Dannay | ... | (story) (as Ellery Queen) and |
| Manfred Lee | ... | (story) (as Ellery Queen) |
| Eric Taylor | ... | (screenplay) |
Cast (in credits order)
| Ralph Bellamy | ... | Ellery Queen | |
| Margaret Lindsay | ... | Nikki Porter | |
| Charley Grapewin | ... | Insp. Queen | |
| James Burke | ... | Sgt. Velle | |
| Michael Whalen | ... | Dr. James Rogers | |
| Marsha Hunt | ... | Barbara Braun | |
| Fred Niblo | ... | John Braun | |
| Charles Lane | ... | Dr. Prouty | |
| Ann Shoemaker | ... | Lydia Braun | |
| Marion Martin | ... | Cornelia | |
| Douglas Fowley | ... | Rocky Taylor | |
| Morgan Wallace | ... | Zachary | |
| Byron Foulger | ... | Amos | |
| Katherine DeMille | ... | Valerie Norris | |
| Rest of cast listed alphabetically: | |||
 |
Peter Bronte | ... | Doctor's Assistant (uncredited) |
| Jack Cheatham | ... | Desk Sergeant (uncredited) | |
|
|
Jimmy the Crow | ... | The Raven (uncredited) |
| Alan Ladd | ... | Elevator Passenger (uncredited) (unconfirmed) | |
| Arthur Millett | ... | Elevator Guard (uncredited) | |
| Frank O'Connor | ... | Ambulance Driver (uncredited) | |
|
|
Lee Phelps | ... | Flynn (uncredited) |
| Jack Rice | ... | Rogers' Assistant (uncredited) | |
Produced by
| Larry Darmour | ... | producer |
Cinematography by
| James S. Brown Jr. | ||
Editing by
| Dwight Caldwell | ||
Second Unit Director or Assistant Director
| Carl Hiecke | ... | assistant director |
Music Department
| Lee Zahler | ... | musical director |
