- John Gavin
- Â Comdr. Dan Talbot 13 episodes, 1965
- John Larch
- Â Capt. Ben Foster / ... 2 episodes, 1965
- Linden Chiles
- Â Chief Officer Steve Kirkland 2 episodes, 1965
- Horst Ebersberg
- Â Juergens 1 episode, 1965
- Michael Stanwood
- Â Myers / ... 2 episodes, 1965
- Eleanor Parker
- Â Kate Fowler 1 episode, 1965
- James McCallion
- Â Burke 1 episode, 1965
- Gia Scala
- Â Madeline Duval 1 episode, 1965
- Sean McClory
- Â Major Perth-Whittaker 1 episode, 1965
- John Marley
- Â Gitano 1 episode, 1965
- Brendan Dillon
- Â Commodore Wells 1 episode, 1965
- James Doohan
- Â Lt. Wells 1 episode, 1965
- Felipe Turich
- Â The Waiter 1 episode, 1965
- Lynne Beaul
- Â The Secretary 1 episode, 1965
- Richard Angarola
- Â Marcel Broussard 1 episode, 1965
- Peter Mamakos
- Â The Dancer 1 episode, 1965
- Leslie Nielsen
- Â Steiner 1 episode, 1965
- Dennis Hopper
- Â Roger Small 1 episode, 1965
- Jack Palance
- Â Harvey Bell 1 episode, 1965
- Diane Baker
- Â Ruth Greene 1 episode, 1965
- Barbara Rush
- Â Alice Bell 1 episode, 1965
- Andrew Prine
- Â Tillman 1 episode, 1965
- Dana Wynter
- Â Dr. Elsa Aufricht 1 episode, 1965
- Harold Gould
- Â Dr. Simpson 1 episode, 1965
- Nehemiah Persoff
- Â Dimitri Federenko 1 episode, 1965
- Diana Hyland
- Â Lt. Katya Katrovich 1 episode, 1965
- Antoinette Bower
- Â Kay 1 episode, 1965
- Donnelly Rhodes
- Â Maj. Leslie 1 episode, 1965
- Don Galloway
- Â Craig 1 episode, 1965
- Noam Pitlik
- Â Shapiro 1 episode, 1965
- Joe Turkel
- Â Hauptman Launer 1 episode, 1965
- Jeannine Riley
- Â Suzie Mae Humbolt 1 episode, 1965
- Jeremy Slate
- Â Erik Larsen 1 episode, 1965
- Jan Shepard
- Â Gillian Haney 1 episode, 1965
- Paul Carr
- Â Lt. Kleiner 1 episode, 1965
- Seymour Cassel
- Â Phelps 1 episode, 1965
- Edward Mulhare
- Â Captain Kurt Von Krug 1 episode, 1965
- Karl Swenson
- Â Lars Hanson 1 episode, 1965
- Liam Sullivan
- Â Leigh 1 episode, 1965
- Monica Lewis
- Â Sister Seraphita 1 episode, 1965
- Frank Marth
- Â Commander Fritz Werner 1 episode, 1965
- Lee Bergere
- Â Boulon 1 episode, 1965
- Sandy Kenyon
- Â Dr. Reece 1 episode, 1965
- Milton Selzer
- Â Eric Sturm 1 episode, 1965
- Katherine Crawford
- Â Felicia Farrington 1 episode, 1965
- John Gallaudet
- Â Bill 1 episode, 1965
- John Leyton
- Â Lt. Detley Henning 1 episode, 1965
- Simon Scott
- Â Gen. Walther Korsch 1 episode, 1965
- Gail Bonney
- Â Mrs. Hansen 1 episode, 1965
- Barbara Morrison
- Â Proprietress 1 episode, 1965
- Marian Collier
- Â Lt. Victoria Shepard 1 episode, 1965
- Arnold Moss
- Â DeGava 1 episode, 1965
- Bart Burns
- Â Beach 1 episode, 1965
- Carl Esmond
- Â Field Marshal Von Speer 1 episode, 1965
- Richard Peel
- Â Father 1 episode, 1965
- Clive Clerk
- Â Morgan 1 episode, 1965
- The Kingston Trio
- Â Folkgroup 1 episode, 1965
- William Stevens
- Â Johnson 1 episode, 1965
- John Stewart
- Â Musician 1 episode, 1965
- Don Wilbanks
- Â O'Day 1 episode, 1965
- Bob Kanter
- Â Albrecht 1 episode, 1965
- Nick Reynolds
- Â Musician 1 episode, 1965
- Bob Shane
- Â Musician 1 episode, 1965
- John Lodge
- Â Doctor 1 episode, 1965
- Vince Carroll
- Â Ashton 1 episode, 1965
- Patricia Tidy
- Â Mother 1 episode, 1965
- James T. Callahan
- Â Lt. Dick O'Connell unknown episodes
- John McLiam
- Â Dr. Farris (uncredited) 1 episode, 1965
- Michèle Montau
- (uncredited) 1 episode, 1965
- Scott Hale
- (uncredited) 1 episode, 1965
- John Biroc
- Â Gregory (uncredited) 1 episode, 1965
