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
