Don Porter

Professor Claude Ruppert

Brenda Joyce

June Spenser

Patricia Morison

Eve Ruppert

Milburn Stone

Gerald King

Samuel S. Hinds

Dean Albert Sears

Kathleen Howard

Eddie

Griff Barnett

Dr. George Carey

Charles D. Brown

Inspector Pepper

Ted Hecht

Lane

Leonard East

Howard

Lewis D. Collins

Director

Josef Mischel

Guión

Maury Gertsman

Director de Fotografía

Universal Pictures

Compañía de Produccion