 |
Donald Meek as Dr. Crabtree |
 |
John Hamilton as Insp. Carr |
 |
Rita Lan as Louisa Von Link |
 |
Douglass Dumbrille as Giuseppe Benito |
 |
Herbert Braggiotti as Nicky Petroff |
 |
Edward Keane as Sergeant |
 |
Almira Sessions as Concert-Goer (uncredited) |
| Writing | S.S. Van Dine | Characters |
| Directing | Joseph Henabery | Director |
| Writing | Burnet Hershey | Writer |
| Camera | Edwin B. DuPar | Director of Photography |
