Character Name : Dale Drewer

Original Name : Richard Garland

Gender : Male

Character Name : Dr. Martha 'Marti' Hunter

Original Name : Pamela Duncan

Gender : Female

Character Name : Hank Chapman

Original Name : Russell Johnson

Gender : Male

Character Name : Dr. Karl Weigand

Original Name : Leslie Bradley

Gender : Male

Character Name : Jules Deveroux

Original Name : Mel Welles

Gender : Male

Character Name : Dr. James Carson

Original Name : Richard H. Cutting

Gender : Male

Character Name : Seaman Ron Fellows

Original Name : Beach Dickerson

Gender : Male

Character Name : Seaman Jack Sommers

Original Name : Tony Miller

Gender : Male

Character Name : Ensign Quinlan

Original Name : Ed Nelson

Gender : Male

Character Name : Seaman Mac, wears sunglasses

Original Name : Charles B. Griffith

Gender : Male

Character Name : Diving-double for male cast

Original Name : Maitland Stuart

Gender : Male

Character Name : Diving-double for Pamela Duncan

Original Name : Robin Riley

Gender : Male