John Agar

as Dr. Roger Bentley

Cynthia Patrick

as Adad

Hugh Beaumont

as Dr. Jud Bellamin

Alan Napier

as Elinu, the High Priest

Nestor Paiva

as Prof. Etienne Lafarge

Phil Chambers

as Dr. Paul Stuart

Rodd Redwing

as Nazar

Robin Hughes

as First Officer

Eddie Parker

as Mole Person

Frank Baxter

as Self (as Dr. Frank C. Baxter)

Robert F. Hoy

as Mole Person

Joe Abdullah

Yvonne de Lavallade

John Dodsworth

Arthur D. Gilmour

Marc Hamilton

Bob Herron

Kay E. Kuter

James Logan

Billy Miller

Joe Rubino

Patrick Whyte