| Mala | ... | Ray Mala (archive footage) | |
| Mamo Clark | ... | Princess Melani (archive footage) | |
| John Picorri | ... | High Priest Porotu (archive footage) | |
| George Chesebro | ... | Draker (cave base chief) (archive footage) | |
| John Ward | ... | Andrew Tupper (archive footage) | |
| William Newell | ... | Hank McGlaurie (archive footage) | |
| John Dilson | ... | Mr. Ellsworth (archive footage) | |
| Selmer Jackson | ... | Mr. Canfield (archive footage) | |
| Herbert Rawlinson | ... | Mr. Jackson (archive footage) | |
| Bob Kortman | ... | Ship Capt. Wilson (archive footage) | |
| F. Herrick Herrick | ... | Sub Capt. Toler (archive footage) | |
| Lloyd Whitlock | ... | Lamar (gang operative) (archive footage) | |
| George Cleveland | ... | Goebel (chief base scientist) (archive footage) | |
| Ed Cassidy | ... | Jim Davis (archive footage) | |
| Allen Connor | ... | Taylor (pilot with drugged cigarettes) (archive footage) | |
| rest of cast listed alphabetically: | |||
| Frazer Acosta | ... | Porotu's Aide (archive footage) (uncredited) | |
| Allan Cavan | ... | Captain of Second Dirigible (archive footage) (uncredited) | |
| Edmund Cobb | ... | Harris Crosby - Saboteur (archive footage) (uncredited) | |
| Val Duran | ... | Cave Base Native Drummer (archive footage) (uncredited) | |
| Frank Ellis | ... | Stocking-Capped Cave Thug (archive footage) (uncredited) | |
| Jerry Jerome | ... | Wallace - Crooked Dirigible Crewman (archive footage) (uncredited) | |
| Cactus Mack | ... | Cave Base Radioman (archive footage) (uncredited) | |
| Ralph McCullough | ... | Goebel's Assistant (archive footage) (uncredited) | |
| Bud Osborne | ... | Black-Capped Heavyset Cave Thug (archive footage) (uncredited) | |
| Anthony Pawley | ... | Dying Radioman on Clipper Island (archive footage) (uncredited) | |
| Eddie Phillips | ... | Ellsworth's Male Secretary (archive footage) (uncredited) | |
| Harry Strang | ... | Grover - Lamar's Pilot (archive footage) (uncredited) | |
| Henry Sylvester | ... | Capt. Fairchild - First Dirigible (archive footage) (uncredited) | |
| Al Taylor | ... | Stubble-Faced Cave Thug (archive footage) (uncredited) | |
| Herbert Weber | ... | Survivor from Clipper Island (archive footage) (uncredited) | |
Directed by | |||
| Ray Taylor | (archive footage) | ||
| Mack V. Wright | (archive footage) | ||
Writing credits(in alphabetical order) | ||
| Morgan Cox | archive footage | |
| Maurice Geraghty | archive footage | |
| Barry Shipman | archive footage | |
Music Department | |||
| Karl Hajos | .... | composer: stock music (archive footage) (uncredited) | |
| Arthur Kay | .... | composer: stock music (archive footage) (uncredited) | |
| Hugo Riesenfeld | .... | composer: stock music (archive footage) (uncredited) | |
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| Robinson Crusoe of Clipper Island | SOS Coast Guard | The Adventures of Smilin' Jack | Spy Smasher Returns | Jungle Gold |
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| Full cast and crew | Company credits | External reviews |
| IMDb Adventure section | IMDb USA section |