Jungle Jim is forced to lead anthropologist Dr. Edwards into a land inhabited by giant people.
| Actor | Role |
|---|---|
 Johnny WeissmüllerJungle Jim | Jungle Jim |
 Angela GreeneDr. Linda Roberts | Dr. Linda Roberts |
 Jean WillesDenise | Denise |
 Lester MatthewsCommissioner Kingston | Commissioner Kingston |
 William Tannen'Doc' Edwards | 'Doc' Edwards |
 George EldredgeFred Lewis | Fred Lewis |
| FFrederic BerestZulu | Zulu |
 TambaTamba | Tamba |
| JJerado DecordovierNative | Native |
| CClem EricksonGiant Man | Giant Man |
 William FawcettOld One | Old One |
 John HartCommissioner's Secretary | Commissioner's Secretary |
 Frank JaquetQuigley | Quigley |
| IIrmgard Helen H. RaschkeGiant Woman | Giant Woman |
| MMax ReidSoldier | Soldier |