- Richard Basehart
- Â Adm. Harriman Nelson / ... 110 episodes, 1964-1968
- David Hedison
- Â Capt. Lee B. Crane / ... 110 episodes, 1964-1968
- Robert Dowdell
- Â Chip Morton / ... 108 episodes, 1964-1968
- Del Monroe
- Â Kowalski / ... 97 episodes, 1964-1968
- Terry Becker
- Â Chief Sharkey / ... 70 episodes, 1965-1968
- Paul Trinka
- Â Patterson / ... 53 episodes, 1964-1968
- Arch Whiting
- Â Sparks 22 episodes, 1964-1968
- Richard Bull
- Â Doctor / ... 27 episodes, 1964-1968
- Henry Kulky
- Â Chief Curley Jones / ... 22 episodes, 1964-1965
- Allan Hunt
- Â Riley / ... 16 episodes, 1965-1966
- Patrick Culliton
- Â Crewman / ... 7 episodes, 1964-1968
- Derrik Lewis
- Â Lieutenant O'Brien / ... 1 episode, 1964-1965
- Paul Carr
- Â Clark / ... 4 episodes, 1964-1967
- Mark Slade
- Â Malone / ... 4 episodes, 1964
- Wayne Heffley
- Â Seaview Doctor 3 episodes, 1965-1966
- Jerry Catron
- Â Buccaneer / ... 3 episodes, 1966-1967
- Skip Homeier
- Â Dr. Jenkins / ... 3 episodes, 1965-1968
- Warren Stevens
- Â Commander Van Wyck / ... 3 episodes, 1965-1967
- Alfred Ryder
- Â Krueger / ... 3 episodes, 1966-1967
- Henry Jones
- Â Mr. Pem / ... 3 episodes, 1966-1968
- Jan Merlin
- Â Henderson / ... 3 episodes, 1964-1967
- Michael Pate
- Â Colonel / ... 3 episodes, 1964-1968
- Malachi Throne
- Â Blackbeard the Pirate / ... 3 episodes, 1964-1967
- Susan Flannery
- Â Katie / ... 2 episodes, 1964-1965
- Robert Doyle
- Â Blake / ... 2 episodes, 1964-1965
- James Frawley
- Â Manolo / ... 2 episodes, 1964-1966
- Werner Klemperer
- Â Brainwasher / ... 1 episode, 1964-1965
- Brent Davis
- Â Corpsman / ... 2 episodes, 1966-1967
- Joe E. Tata
- Â Corpsman / ... 1 episode, 1964-1967
- Lloyd Bochner
- Â Gen. Hobson / ... 2 episodes, 1964-1965
- John Van Dreelen
- Â Admiral the Baron Gustave Von Neuberg / ... 2 episodes, 1965-1967
- Peter Mark Richman
- Â Gantt / ... 2 episodes, 1966-1968
- Michael Ansara
- Â Capt. Tomas Ruiz / ... 2 episodes, 1964-1966
- David Sheiner
- Â Chandler / ... 2 episodes, 1965-1966
- Barry Atwater
- Â Logan / ... 2 episodes, 1965-1968
- Kevin Hagen
- Â Holden / ... 2 episodes, 1966-1968
- Victor Lundin
- Â Alien / ... 2 episodes, 1966-1968
- Bert Freed
- Â Dr. Ullman / ... 2 episodes, 1965
- Vitina Marcus
- Â Lani / ... 2 episodes, 1964-1966
- Ford Rainey
- Â President Henry Talbot McNeal 2 episodes, 1964-1965
- Harry Davis
- Â Konstantin / ... 2 episodes, 1965-1966
- Gene Dynarski
- Â Centaur I / ... 2 episodes, 1965-1967
- Robert Cornthwaite
- Â Gen. Reed Michaels / ... 2 episodes, 1964-1965
- Bruce Mars
- Â Bosun's Mate / ... 2 episodes, 1966-1968
- Lew Gallo
- Â Kruger / ... 2 episodes, 1966
- John Zaremba
- Â Admiral Johnson / ... 2 episodes, 1964-1965
- Françoise Bush
- Â Brenda / ... 2 episodes, 1965
- Booth Colman
- Â Chairman 2 episodes, 1964
- Robert Lipton
- Â Helmsman / ... 2 episodes, 1965
- Frank Babich
- Â Corpsman / ... 2 episodes, 1968
- Robert Carson
- Â Jurgenson / ... 2 episodes, 1964-1967
- Brendan Dillon
- Â Captain Jacob Wren / ... 1 episode, 1964-1967
- Paul Comi
- Â Hawkins / ... 1 episode, 1964-1966
- George Keymas
- Â Igor / ... 1 episode, 1965-1966
- Jock Gaynor
- Â Dr. Randolph Mason / ... 1 episode, 1967
- James Doohan
- Â Lawrence Tobin 1 episode, 1964
- Roy Jenson
- Â Crewman / ... 1 episode, 1966-1967
- William Hudson
- Â Capt. John Phillips / ... 1 episode, 1964-1965
- Frank Graham
- Â Danny / ... 1 episode, 1964-1965
- Nigel McKeand
- Â Sonar 1 episode, 1965
- Seymour Cassel
- Â Jensen 1 episode, 1966-1968
- Dawson Palmer
- Â Monster / ... 1 episode, 1966-1967
- Ivan Triesault
- Â Commander / ... 1 episode, 1964-1966
- Alfred Shelly
- Â Chairman / ... 1 episode, 1965-1966
- June Lockhart
- Â Ellen Bryce 1 episode, 1964
- Carroll O'Connor
- Â Old John 1 episode, 1964
- Eddie Albert
- Â Dr. Fred Wilson 1 episode, 1964
- Viveca Lindfors
- Â Dr. Laura Rettig 1 episode, 1964
- Nick Adams
- Â Jason 1 episode, 1964
- Richard Carlson
- Â Lars Mattson 1 episode, 1964
- Hurd Hatfield
- Â Leopold Zeraff 1 episode, 1964
- Everett Sloane
- Â Gronski 1 episode, 1964
- Charles McGraw
- Â Rear Adm. Tobin 1 episode, 1964
- David Opatoshu
- Â Reisner 1 episode, 1964
- Carl Reindel
- Â Evans 1 episode, 1964
- Rita Gam
- Â Detta 1 episode, 1964
- Mario Alcalde
- Â Major Amadi 1 episode, 1964
- Robert Duvall
- Â Zar 1 episode, 1965
- Edward Asner
- Â Brynov 1 episode, 1965
- Leslie Nielsen
- Â Adams 1 episode, 1965
- Karen Steele
- Â Cara 1 episode, 1965
- John Cassavetes
- Â Everett Lang 1 episode, 1965
- George Sanders
- Â Fenton 1 episode, 1965
- Gia Scala
- Â Dr. Katya Markova 1 episode, 1965
- John Anderson
- Â Dr. Janus 1 episode, 1965
- Henry Silva
- Â Gen. Tau 1 episode, 1965
- Ina Balin
- Â Litchka 1 episode, 1965
- Victor Buono
- Â Tabor Ulrich 1 episode, 1965
- Michael Constantine
- Â Dr. Brand 1 episode, 1965
- Roger C. Carmel
- Â Admiral Halder 1 episode, 1965
- Harold J. Stone
- Â Admiral Jiggs Starke 1 episode, 1965
- J.D. Cannon
- Â Falk 1 episode, 1965
- John McGiver
- Â Alexander Corby 1 episode, 1965
- Torin Thatcher
- Â MacDougall 1 episode, 1965
- Cyril Delevanti
- Â Noah Grafton 1 episode, 1965
- Phillip Pine
- Â Ryan 1 episode, 1965
- Pilar Seurat
- Â Moana 1 episode, 1965
- Simon Scott
- Â Reston 1 episode, 1965
- Donald Harron
- Â Corbett 1 episode, 1965
- Renzo Cesana
- Â Count Ferdie Staglione 1 episode, 1965
- Robert Loggia
- Â Dr. Crandall Ames 1 episode, 1966
- James Darren
- Â Omir 1 episode, 1966
- Albert Salmi
- Â Brent 1 episode, 1966
- Paul Fix
- Â Sam Burke 1 episode, 1966
- Nehemiah Persoff
- Â Dobbs 1 episode, 1966
- Hugh Marlowe
- Â Bainbridge Wells 1 episode, 1966
- Don Gordon
- Â Stan Kowalski 1 episode, 1966
- Gary Merrill
- Â Park 1 episode, 1966
- Charles Aidman
- Â Dr. Hollis 1 episode, 1966
- John Lupton
- Â Dr. Bradley 1 episode, 1966
- Arthur Hill
- Â Lindsay 1 episode, 1966
- William Smithers
- Â Ben Wilson / ... 1 episode, 1966
- David J. Stewart
- Â Weber 1 episode, 1966
- Vincent Price
- Â Professor Multiple 1 episode, 1967
- Victor Jory
- Â Dr. Turner 1 episode, 1967
- John Crawford
- Â Alpha 1 episode, 1967
- Woodrow Parfrey
- Â Leo Brock 1 episode, 1967
- Don Dubbins
- Â C.P.O. Beach 1 episode, 1967
- Lyle Bettger
- Â Dr. King 1 episode, 1967
- Michael Dunn
- Â Clown 1 episode, 1967
- Arthur Space
- Â Dr. Land 1 episode, 1967
- Don Matheson
- Â Proto 1 episode, 1967
- Walter Burke
- Â Leprechaun Mickey Moore O'Shaughnessy / ... 1 episode, 1968
- Chris Robinson
- Â Corpsman Mallory 1 episode, 1968
- Perry Lopez
- Â Keeler 1 episode, 1968
- Lawrence Montaigne
- Â Dr. Braddock 1 episode, 1968
- Paul Mantee
- Â Jim Bentley 1 episode, 1968
- Yvonne Craig
- Â Carol 1 episode, 1964
- Linda Cristal
- Â Melina Gounaris 1 episode, 1964
- John Hoyt
- Â General Beeker 1 episode, 1964
- Adam Williams
- Â Chief 1 episode, 1964
- Edward Binns
- Â Walter Bryce 1 episode, 1964
- Alejandro Rey
- Â Ricardo 1 episode, 1964
- Milton Selzer
- Â Dr. Melton 1 episode, 1964
- John Milford
- Â Wesley 1 episode, 1964
- Edgar Bergen
- Â Kenner 1 episode, 1964
- Danielle De Metz
- Â Anna Ravec 1 episode, 1964
- Sara Shane
- Â Countess 1 episode, 1964
- Anna-Lisa
- Â Sigrid 1 episode, 1964
- Eddie Ryder
- Â Harker 1 episode, 1964
- Monique LeMaire
- Â Luana 1 episode, 1964
- George Takei
- Â Cheng 1 episode, 1965
- Whit Bissell
- Â Connors 1 episode, 1965
- Brooke Bundy
- Â Gundi 1 episode, 1965
- Regis Toomey
- Â George Penfield 1 episode, 1965
- Vincent Gardenia
- Â Bellini 1 episode, 1965
- Audrey Dalton
- Â Lydia Parrish 1 episode, 1965
- Arthur Franz
- Â Archer 1 episode, 1965
- Joe De Santis
- Â Miklos 1 episode, 1965
- Liam Sullivan
- Â Dr. Anthony Sterling 1 episode, 1965
- Curt Conway
- Â Dr. Winslow 1 episode, 1965
- Hedley Mattingly
- Â Lester 1 episode, 1965
- Harry Millard
- Â The Man 1 episode, 1965
- Patrick Wayne
- Â Fraser 1 episode, 1966
- John Dehner
- Â Borgman 1 episode, 1966
- Gerald Mohr
- Â Athos Vadim 1 episode, 1966
- Robert H. Harris
- Â Carleton 1 episode, 1966
- Arthur O'Connell
- Â Paul 1 episode, 1966
- Marian McCargo
- Â Karyl 1 episode, 1966
- Jill Ireland
- Â Julie 1 episode, 1964
- Malcolm Atterbury
- Â Commander Jamison 1 episode, 1964
- Les Tremayne
- Â Denning 1 episode, 1964
- Theodore Marcuse
- Â Dr. Gamma 1 episode, 1964
- Sheila Allen
- Â Mrs. Melton 1 episode, 1964
- John Alderson
- Â Round-Face 1 episode, 1964
- Than Wyenn
- Â Anton Koslow 1 episode, 1964
- Barbara Bouchet
- Â Tippy Penfield 1 episode, 1965
- Alvy Moore
- Â Hoff 1 episode, 1965
- Irene Tsu
- Â Su Yin 1 episode, 1965
- Rudy Solari
- Â Tomas 1 episode, 1965
- Ted de Corsia
- Â Foreign General 1 episode, 1965
- Robert Sampson
- Â Capt. Williams 1 episode, 1965
- George Mitchell
- Â Angus 1 episode, 1965
- Teru Shimada
- Â Nakamura 1 episode, 1965
- Delphi Lawrence
- Â Julietta 1 episode, 1965
- Émile Genest
- Â French Captain 1 episode, 1965
- Russell Horton
- Â Fred 1 episode, 1965
- Jay Lanin
- Â Captain of Jefferson 1 episode, 1965
- Zale Parry
- Â Angela Madison 1 episode, 1965
- Frank Marth
- Â McHenry 1 episode, 1966
- Elizabeth Perry
- Â Tracy 1 episode, 1966
- Dusty Cadis
- Â Rayburn 1 episode, 1968
- Edward Platt
- Â Morgan 1 episode, 1964
- Wright King
- Â Dr. Baines 1 episode, 1964
- Jacques Aubuchon
- Â Abdul Azziz 1 episode, 1964
- Al Ruscio
- Â Dimitri Gounaris 1 episode, 1964
- Steven Geray
- Â Oskar Dalgren 1 episode, 1964
- Michel Petit
- Â Prince Ang 1 episode, 1964
- Edward Colmans
- Â Fuentes 1 episode, 1964
- Bob Payne
- Â Murdock 1 episode, 1964
- Tom Skerritt
- Â Richardson 1 episode, 1965
- Charles Dierkop
- Â Left-Handed Man 1 episode, 1965
- John McLiam
- Â Andrews 1 episode, 1965
- Robert F. Simon
- Â President 1 episode, 1965
- Lew Brown
- Â Lt. Comdr. Jackson 1 episode, 1965
- Paul Genge
- Â General Ashton 1 episode, 1965
- Herbert Lytton
- Â First Admiral 1 episode, 1965
- Alexander D'Arcy
- Â Lago 1 episode, 1965
- Dale Ishimoto
- Â Premier 1 episode, 1965
- Eric Feldary
- Â Deiner 1 episode, 1965
- Barry Coe
- Â Balter 1 episode, 1966
- Allen Jaffe
- Â Sebastian 1 episode, 1966
- Douglas Bank
- Â Witt 1 episode, 1966
- Diane Webber
- Â Mermaid 1 episode, 1967
- William Beckley
- Â Major John Andre 1 episode, 1968
- Henry Darrow
- Â Captain Serra 1 episode, 1964
- George Lindsey
- Â Collins 1 episode, 1964
- Joseph Ruskin
- Â Inspector Falazir 1 episode, 1964
- Frank Ferguson
- Â Air Force General 1 episode, 1964
- Peter Brocco
- Â Xanthos 1 episode, 1964
- Walter Brooke
- Â Dan Case 1 episode, 1964
- David Lewis
- Â Dr. Kranz 1 episode, 1964
- Oscar Beregi Jr.
- Â Colonel Lascoe 1 episode, 1964
- Jan Arvan
- Â Georges 1 episode, 1964
- Frank Richards
- Â Hassler 1 episode, 1964
- James Brolin
- Â Spencer 1 episode, 1965
- Jason Wingreen
- Â Mikhil 1 episode, 1965
- Walter Sande
- Â Second Admiral 1 episode, 1965
- Judy Lang
- Â Angie 1 episode, 1965
- Howard Wendell
- Â Dr. Andrew Benton 1 episode, 1965
- Dayton Lummis
- Â Reinhardt 1 episode, 1965
- Nancy Hsueh
- Â Tish Sweetly 1 episode, 1965
- George Tyne
- Â Liscomb 1 episode, 1965
- Steve Harris
- Â Fowler 1 episode, 1965
- Michael McDonald
- Â Foster 1 episode, 1965
- Harold Dyrenforth
- Â Doctor 1 episode, 1965
- June Vincent
- Â Ava 1 episode, 1966
- Cec Linder
- Â Van Druten 1 episode, 1966
- John Newton
- Â Commander Richard Lawrence 1 episode, 1966
- Robert Swimmer
- Â Pirate 1 episode, 1966
- Jon Lormer
- Â Dr. Pierre Blanchard 1 episode, 1967
- Don Knight
- Â Sven Larsen 1 episode, 1967
- Howard Culver
- Â Reporter 1 episode, 1967
- Jim Gosa
- Â Centaur II 1 episode, 1967
- Ralph Garrett
- Â Somers 1 episode, 1968
- Nancy Kovack
- Â Monique 1 episode, 1964
- John Banner
- Â Russian Chairman 1 episode, 1964
- William Boyett
- Â Air Force Lt. 1 episode, 1964
- Richard Webb
- Â Parker 1 episode, 1964
- Ed Prentiss
- Â Phillip James 1 episode, 1964
- Peter Mamakos
- Â Nicolas 1 episode, 1964
- Stan Jones
- Â Dr. Anderson 1 episode, 1964
- Bobby Beakman
- Â Jimmy Bryce 1 episode, 1964
- James Anderson
- Â Wilson 1 episode, 1965
- Ben Wright
- Â Brewster 1 episode, 1965
- Richard Loo
- Â Li Tung 1 episode, 1965
- Lloyd Kino
- Â Policeman 1 episode, 1965
- Joe Higgins
- Â Magistrate 1 episode, 1965
- Rachel Romen
- Â Alicia 1 episode, 1965
- Larry D. Mann
- Â Diver 1 episode, 1966
- Francis X. Bushman
- Â Old Man 1 episode, 1966
- Dallas Mitchell
- Â Sonar Man - Destroyer 1 episode, 1966
- Bill Baldwin
- Â Bill - Aide 1 episode, 1967
- Damian O'Flynn
- Â Dr. Thompson 1 episode, 1967
- Bradd Arnold
- Â Page 1 episode, 1967
- Steve Ihnat
- Â Pennell 1 episode, 1964
- Kenneth MacDonald
- Â Surgeon 1 episode, 1964
- Berry Kroeger
- Â Chairman 1 episode, 1964
- Robert Patten
- Â Naval Doctor 1 episode, 1964
- Torben Meyer
- Â Proprietor 1 episode, 1964
- William Sargent
- Â Anders 1 episode, 1964
- Michael Pataki
- Â Officer 1 episode, 1965
- Richard Gilden
- Â Tal 1 episode, 1965
- John Gallaudet
- Â Admiral Johnson 1 episode, 1965
- Tudor Owen
- Â Crofter 1 episode, 1965
- John Goddard
- Â Tracy 1 episode, 1965
- Ed McCready
- Â Hill 1 episode, 1965
- Freddie Roberto
- Â Croupier 1 episode, 1965
- Phil Posner
- Â Stevens 1 episode, 1965
- Gus Trikonis
- Â Sonar Man - Sub. 1 episode, 1966
- Janos Prohaska
- Â Gorilla 1 episode, 1967
- Eric Matthews
- Â Maj. Bob Wilson 1 episode, 1967
- George Robotham
- Â Frost Man #2 1 episode, 1968
- Martin Kosleck
- Â Director 1 episode, 1964
- Biff Elliot
- Â Lineman 1 episode, 1964
- Douglas Lambert
- Â Williams 1 episode, 1964
- Greger Vigen
- Â The Boy 1 episode, 1964
- Bert Remsen
- Â Senator Kimberly 1 episode, 1965
- Kent Taylor
- Â Johnson 1 episode, 1965
- Lee Millar
- Â Soldier 1 episode, 1965
- Walter Woolf King
- Â Hansen 1 episode, 1965
- Michael Barrier
- Â Cabrillo 1 episode, 1965
- Margot Stevenson
- Â Betty 1 episode, 1965
- Harry Lauter
- Â Cmdr. Finch 1 episode, 1966
- Erik Holland
- Â Gartern 1 episode, 1964
- Peter Adams
- Â Johnson 1 episode, 1964
- Jon Kowal
- Â Policeman 1 episode, 1965
- Danica D'Hondt
- Â Lola Hale 1 episode, 1965
- George Zaima
- Â Scientist 1 episode, 1965
- Herb Voland
- Â Carter 1 episode, 1966
- Joseph Walsh
- Â Atlas 1 episode, 1964
- Frank Delfino
- Â Boy - Midget 1 episode, 1965
- Lee Kolima
- Â Junk Captain 1 episode, 1965
- Ed Connelly
- Â Rourke 1 episode, 1966
- Weaver Levy
- Â Oriental Colonel 1 episode, 1964
- George Young
- Â Lang's Accomplice 1 episode, 1965
- Armand Alzamora
- Â Spanish Major 1 episode, 1964
- Kort Falkenberg
- Â The Father 1 episode, 1964
- Mike Kellin
- Â Steban 1 episode, 1964
- Gordon Gilbert
- Â O'Brien 1 episode, 1964
- John Strong
- Â Radioman Monroe 1 episode, 1967
- Ron Stein
- Â Crew Member / ... (uncredited) 37 episodes, 1964-1968
- Philip Barry
- Â Crew Member / ... (uncredited) 32 episodes, 1966-1968
- Marco Lopez
- Â Crewman / ... (uncredited) 1 episode, 1966-1968
- Darryl Scott McFadden
- Â Alien / ... (uncredited) 7 episodes, 1965-1968
- Paul Zastupnevich
- Â Aleksei / ... (uncredited) 5 episodes, 1964-1965
- Tyler McVey
- Â Gen. Blake / ... (uncredited) 3 episodes, 1964-1968
- Irwin Allen
- Â Crewman / ... (uncredited) 3 episodes, 1964-1965
- Charles Horvath
- Â Assassin Henchman / ... (uncredited) 3 episodes, 1965-1967
- Ted Jordan
- Â Astronaut #2 / ... (uncredited) 3 episodes, 1965-1967
- Jim Mills
- Â Alien Leader's Voice / ... (uncredited) 3 episodes, 1966-1967
- Bart La Rue
- Â Captain Jacob Wren / ... (uncredited) 3 episodes, 1967-1968
- Dick Tufeld
- Â Brain / ... (uncredited) 2 episodes, 1964-1966
- Kenner G. Kemp
- Â General / ... (uncredited) 2 episodes, 1964-1965
- Hal Torey
- Â Air Force General / ... (uncredited) 2 episodes, 1964-1965
- Jim Goodwin
- Â Helmsman (uncredited) 4 episodes, 1964-1966
- Bob Pane
- Â Helmsman (uncredited) 2 episodes, 1965
- Ray Didsbury
- Â Collins / ... (uncredited) 2 episodes, 1966-1967
- Pat Priest
- Â Karen Joyce Pennell (uncredited) 1 episode, 1964
- Dan Seymour
- Â General (uncredited) 1 episode, 1964
- James Seay
- Â Mr. Secretary (uncredited) 1 episode, 1964
- Buck Kartalian
- Â Crew Member (uncredited) 1 episode, 1964
- Christopher Connelly
- Â Sparks (uncredited) 1 episode, 1964
- Chuck Courtney
- Â Crew Member (uncredited) 1 episode, 1964
- John Fujioka
- Â Enemy Agent in Room (uncredited) 1 episode, 1964
- Arthur Peterson
- Â Official (uncredited) 1 episode, 1964
- Maurice Manson
- Â Russian (uncredited) 1 episode, 1964
- Walter Reed
- Â Scientist (uncredited) 1 episode, 1964
- Fred Stromsoe
- Â Fox (uncredited) 1 episode, 1964
- Tom Palmer
- Â Dr. Taylor (uncredited) 1 episode, 1964
- Joe Di Reda
- Â Spaceman (uncredited) 1 episode, 1964
- Dennis Cross
- Â Operator on Starfish (uncredited) 1 episode, 1964
- Ronnie Rondell Jr.
- Â Driver (uncredited) 1 episode, 1964
- Larry Kerr
- Â Joe Oberhansly (uncredited) 1 episode, 1964
- Paul Stader
- Â Villager (uncredited) 1 episode, 1964
- Frank Biro
- Â Army General (uncredited) 1 episode, 1964
- Peter Bourne
- Â Maris (uncredited) 1 episode, 1964
- John Lamb
- Â Native (uncredited) 1 episode, 1964
- Tony Monaco
- Â Seaview Cook (uncredited) 1 episode, 1964
- William Kinney
- Â Crew Member (uncredited) 1 episode, 1964
- Chuy Franco
- Â Villager (uncredited) 1 episode, 1964
- Fred Zendar
- Â Crew Member (uncredited) 1 episode, 1964
- Athan Karras
- Â Hotel Clerk (uncredited) 1 episode, 1964
- Mike Ferris
- Â Asian (uncredited) 1 episode, 1964
- Alf George
- Â Villager (uncredited) 1 episode, 1964
- Clyde Cameron
- Â Rolvaag (uncredited) 1 episode, 1964
- Oren Curtis
- Â Asian (uncredited) 1 episode, 1964
- Kenneth Brischof
- Â Villager (uncredited) 1 episode, 1964
- Nicholas Colasanto
- Â Reporter (uncredited) 1 episode, 1965
- Fred Crane
- Â Cyborg Voices (uncredited) 1 episode, 1965
- James Gonzalez
- Â Casino Patron (uncredited) 1 episode, 1965
- William Stevens
- Â Radarman (uncredited) 1 episode, 1965
- George Holmes
- Â Casino Patron (uncredited) 1 episode, 1965
- Murray Pollack
- Â Casino Patron (uncredited) 1 episode, 1965
- Benjie Bancroft
- Â General (uncredited) 1 episode, 1965
- George Sawaya
- Â Foreign Agent (uncredited) 1 episode, 1965
- Hans Moebus
- Â Casino Patron (uncredited) 1 episode, 1965
- Lee Delano
- Â Space Center Technician (uncredited) 1 episode, 1965
- Tom Curtis
- Â First Technician (uncredited) 1 episode, 1965
- Bob Legionaire
- Â Commander, Arctic Radar Station (uncredited) 1 episode, 1965
- Preston Hanson
- Â Flight Director (uncredited) 1 episode, 1965
- Dick Dial
- Â Soldier #2 (uncredited) 1 episode, 1965
- Robert Chadwick
- Â Astronaut #1 (uncredited) 1 episode, 1965
- Stanley Schneider
- Â Sailor (uncredited) 1 episode, 1965
- Thomas Nello
- Â Antonio (uncredited) 1 episode, 1965
- Anthony Brand
- Â Technician (uncredited) 1 episode, 1965
- Paul Kremin
- Â Waiter (uncredited) 1 episode, 1965
- Ken Tilles
- Â First Gondolier (uncredited) 1 episode, 1965
- Sandra Williams
- Â Stewardess (uncredited) 1 episode, 1965
- Sue England
- Â Woman's Voice (uncredited) 1 episode, 1966
- Michael Fox
- Â Gen. Haines (uncredited) 1 episode, 1966
- Bill Hickman
- Â Missile Room Man (uncredited) 1 episode, 1966
- Gene LeBell
- Â Vulcan Crew Member (uncredited) 1 episode, 1966
- Ross Elliott
- Â Chairman's Assistant (uncredited) 1 episode, 1966
- Robert Brubaker
- Â Admiral Howard (uncredited) 1 episode, 1966
- Sean Morgan
- Â Gantt's Sonar Man (uncredited) 1 episode, 1966
- Stan Kamber
- Â Sailor (uncredited) 1 episode, 1966
- Robert Riordan
- Â Vendon (uncredited) 1 episode, 1966
- George Sims
- Â Bailey (uncredited) 1 episode, 1966
- Gregory Morton
- Â Nelson's Controller (uncredited) 1 episode, 1967
- Bob McFadden
- Â Invader (uncredited) 1 episode, 1967
- Jackie Basehart
- Â Crewman Jackson (uncredited) 1 episode, 1967
- Chuck Couch
- Â Adam (uncredited) 1 episode, 1967
- William Kelley
- Â Sparks (uncredited) 1 episode, 1967
- Thom Brann
- Â Crewman (uncredited) 1 episode, 1967
- Allen Wurtzel
- Â Blair (uncredited) 1 episode, 1967
- Nick Dimitri
- Â Alien #2 (uncredited) 1 episode, 1968
- Troy Melton
- Â Alien (uncredited) 1 episode, 1968
- Ron Gans
- Â Abominable Snowman (uncredited) 1 episode, 1968
- John Bellah
- Â Crewman (uncredited) 1 episode, 1968
- Denver Mattson
- Â Alien (uncredited) 1 episode, 1968