Tod Andrews as Dr. William Arnold

Tina Carver as Dr. Terry Mason

Linda Watkins as Mrs. Mae Kilgore

John McNamara as Professor Clark

Gregg Palmer as Kimo

Baynes Barron as Chief Maranka

Robert Swan as Tano

Suzanne Ridgway as Korey

Mark Sheeler as Eddie

Lee Rhodes as Norgu

Grace Mathews as Orchid

Tani Marsh as Naomi

Chester Hayes as Maku / The Tabanga

Lenmana Guerin as Dori

Al Kikume as Native (uncredited)

Max Reid as Native (uncredited)