Harry Garson Director Mae Stuart Alma Thorne Actor John Preston Bob Ward Actor Eugene Sigaloff Dr. Boris Borodoff Actor Alexander Schoenberg Derrik Van De Mark Actor Doris Brook Nahnda Actor Val Duran Darmo Actor John S. Peters Kruger Actor Jo-Jo The Urangutan The Urangutan Actor Alfred Hustwick Screenwriter Lewis W. Physioc Cinematographer William Faris Film Editing Vivienne Cabanne Costume Design