Trailer
Images
 | Buster Crabbe as Kaspa |
 | Frances Dee as Ann Rogers |
 | Sidney Toler as Neil Forbes |
 | Nydia Westman as Sue |
 | Robert Barrat as Joe Nolan |
 | Irving Pichel as Corey |
 | Douglass Dumbrille as Ed Peters |
 | Sam Baker as Gwana |
 | Patricia Farley as Kitty |
 | Ronnie Cosby as Kaspa, aged 3 |
 | Robert Adair as John C. Knolls (uncredited) |
| Thomas Amos as Bit Role (uncredited) |
 | Florence Britton as Mrs. Edith Knolls (uncredited) |
 | Don Brodie as Reporter (uncredited) |
 | Leonard Carey as Clerk at Hunting License Bureau (uncredited) |
 | Nora Cecil as Spinster in park (uncredited) |
 | William R. Dunn as Bit Role (uncredited) |
| Harold Farley as Bit Role (uncredited) |
| Sam Farrell as Bit Role (uncredited) |
 | William J. Kelly as Government Inspector (uncredited) |
 | Fred Kelsey as Cop (uncredited) |
 | Edward LeSaint as Policeman (uncredited) |
 | Tom London as Lion Attendant (uncredited) |
 | Lee Phelps as Customs Inspector (uncredited) |
| F.M. Pitts as Bit Role (uncredited) |
 | Warner Richmond as Gus (uncredited) |
| Mabel Stark as Spinster in park (uncredited) |
 | Harry Strang as Lion Attendant (uncredited) |
 | Phil Tead as Reporter (uncredited) |
| George Turner as Bit Role (uncredited) |
| Production | |
| E. Lloyd Sheldon | Associate Producer |
Writing | |
| Charles Thurley Stoneham | Novel |
Crew | |
| Gordon Jennings | Special Effects |
Writing | |
| Max Marcin | Adaptation |
Directing | |
| H. Bruce Humberstone | Director |
| Max Marcin | Director |
Writing | |
| Philip Wylie | Screenplay |
| Fred Niblo Jr. | Screenplay |
Sound | |
| Herman Hand | Original Music Composer |
| Harry D. Mills | Sound |
Production | |
| Mel Ballerino | Casting |
Crew | |
| Mabel Stark | Stunts |
Camera | |
| Ernest Haller | Director of Photography |
Directing | |
| Jules White | Assistant Director |
Sound | |
| John Leipold | Original Music Composer |
| Rudolph G. Kopp | Original Music Composer |
Production | |
| Fred A. Datig | Casting |
