Richard Garland
饰 Dale Drewer
Pamela Duncan
饰 Dr. Martha 'Marti' Hunter
Russell Johnson
饰 Hank Chapman
Leslie Bradley
饰 Dr. Karl Weigand
Mel Welles
饰 Jules Deveroux
Richard H. Cutting
饰 Dr. James Carson
Beach Dickerson
饰 Seaman Ron Fellows
Tony Miller
饰 Seaman Jack Sommers
Charles B. Griffith
饰 Seaman Mac, wears sunglasses
Maitland Stuart
饰 Diving-double for male cast
Robin Riley
饰 Diving-double for Pamela Duncan
