H.B. Warner

Character: Prof. Dangerfield

Louise Fazenda

Character: Mrs. Fleming

Jacqueline Logan

Character: Irene

Henry B. Walthall

Character: Capt. Rhodes - Yacht Commander

Claude Gillingwater

Character: James Rutherford - Expedition Leader

John Miljan

Character: Dr. Milo

George Beranger

Character: Simpson - Guide

Warner Richmond

Character: First Mate

Floyd Shackelford

Character: Sam - Cook

Lionel Belmore

Character: Amos Sewald

Charles Gemora

Character: Gorilla (uncredited)