Lord John Roxton
Jennifer Holmes
Ed Malone
Prof. George Edward Challenger
Manuel Gomez
Prof. Summerlee
David Holmes
Costa
Native Girl
Burton White
Prof. Waldron (uncredited)
Stuart Holmes (uncredited)
Indian Chief (uncredited)
Reporter at Airport (uncredited)
Man at Airport (uncredited)
Guest at Zoological Institute Forum (uncredited)
Guest at Zoological Institute Forum (uncredited)
Guest at Zoological Institute Forum (uncredited)
Guest at Zoological Institute Forum (uncredited)