Calificación
Reparto

Richard Garland
Dale Drewer

Pamela Duncan
Dr. Martha 'Marti' Hunter

Russell Johnson
Hank Chapman

Leslie Bradley
Dr. Karl Weigand

Mel Welles
Jules Deveroux

Richard H. Cutting
Dr. James Carson

Beach Dickerson
Seaman Ron Fellows

Tony Miller
Seaman Jack Sommers

Ed Nelson
Ensign Quinlan

Charles B. Griffith
Seaman Mac, wears sunglasses

Maitland Stuart
Diving-double for male cast

Robin Riley
Diving-double for Pamela Duncan