Characters played by Richard Garland
Dale Brewer
Characters played by Pamela Duncan
Martha Hunter
Characters played by Russell Johnson
Hank Chapman
Characters played by Leslie Bradley
Dr. Karl Weigand
Characters played by Mel Welles
Jules Deveroux
Characters played by Richard H. Cutting
Dr. James Carson
Characters played by Beach Dickerson
Seaman Ron Fellows
Characters played by Tony Miller
Seaman Jack Sommers
Characters played by Ed Nelson
Lt. Quinlan
Characters played by Robin Riley
Seaman
Characters played by Doug Roberts
Seaman
Characters played by Charles B. Griffith
Seaman Tate
Characters played by Maitland Stuart
Seaman Mac