Del Monroe
Kowalski (111 eps)
Paul Trinka
Patterson (111 eps)
Richard Basehart
Adm. Harriman Nelson (110 eps)
David Hedison
Captain Crane (110 eps)
Terry Becker
Chief Sharkey (110 eps)
Richard Bull
Doctor (110 eps)
Robert Dowdell
Chip Morton (110 eps)
Arch Whiting
Sparks (uncredited) (3 eps)
Henry Kulky
Curley Jones (2 eps)
Michael Ansara
Malinoff (2 eps)
Alfred Shelly
Murphy (2 eps)
James Doohan
Lawrence Tobin (2 eps)
Victor Buono
Tabor Ulrich (1 eps)
Adam Williams
Chief (1 eps)
Danica D'Hondt
Lola Hale (1 eps)
Diane Webber
Mermaid (1 eps)
Douglas Bank
Witt (1 eps)
Judy Lang
Angie (1 eps)
Barbara Bouchet
Tippy Penfield (1 eps)
Regis Toomey
George Penfield (1 eps)
Cyril Delevanti
Noah Grafton (1 eps)
Charles Dierkop
Left-Handed Man (1 eps)
Michael Barrier
Cabrillo (1 eps)
Ted de Corsia
Foreign General (1 eps)
Herbert Lytton
First Admiral (1 eps)
Brooke Bundy
Gundi (1 eps)
Nicholas Colasanto
Reporter (uncredited) (1 eps)
Lloyd Bochner
Martin Davis (1 eps)
Edgar Bergen
Kenner (1 eps)
Walter Brooke
Dan Case (1 eps)
Eric Feldary
Deiner (1 eps)
Dayton Lummis
Reinhardt (1 eps)
Roger C. Carmel
Admiral Halder (1 eps)
John Gallaudet
Admiral Johnson (1 eps)
David Sheiner
Chandler (1 eps)
Frank Ferguson
Air Force General (1 eps)
Damian O'Flynn
Dr. Thompson (1 eps)
Don Knight
Sven Larsen (1 eps)
Arthur Franz
Archer (1 eps)
Alvy Moore
Hoff (1 eps)
Harold J. Stone
Admiral Jiggs Starke (1 eps)
John Banner
Russian Chairman (1 eps)
Edward Platt
Morgan (1 eps)
Nancy Kovack
Monique (1 eps)
Susan Flannery
Stenographer (uncredited) (1 eps)
Patrick Wayne
Fraser (1 eps)
Nick Dimitri
Alien #2 (uncredited) (1 eps)