A scientific expedition happens to discover that gold exists on Tarzan's escarpment. The villainous Medford and Vandermeer kidnap Jane and Boy to extort from Tarzan the location of the gold.
| Actor | Role |
|---|---|
 Johnny WeissmüllerTarzan | Tarzan |
 Maureen O'SullivanJane | Jane |
 Johnny SheffieldBoy | Boy |
 Reginald OwenProfessor Elliott | Professor Elliott |
 Barry FitzgeraldDennis O'Doul | Dennis O'Doul |
 Tom ConwayMedford | Medford |
 Philip DornVandermeer | Vandermeer |
 Cordell HickmanTumbo | Tumbo |