威廉·约翰斯通
William Johnstone
饰：Secretary Masters,1 episode, 1955,
Clifford Sales
饰：Jodie Morton,unknown episodes,
Jack Grimes
饰：T.J. Thistle,54 episodes, 1951-1955, / ...
Leon Janney
饰：Blair,2 episodes, 1953-1955, / ...
大卫·沙伊纳
David Sheiner
饰：1 episode, 1955
Jan Merlin
饰：Roger Manning,61 episodes, 1950-1955, / ...
Frankie Thomas
饰：Tom Corbett,88 episodes, 1950-1955, / ...
Frank Sutton
饰：Cadet Rattison,34 episodes, 1951-1955, / ...
比尔·朱克特
Bill Zuckert
饰：Brock,1 episode, 1955,
鲍勃·黑斯廷斯
Bob Hastings
饰：Jim Myers,1 episode, 1955,
Humphrey Davis
饰：Captain Brad Farley,1 episode, 1954,
Robert Dryden
饰：Barker,1 episode, 1955,
约翰·菲德勒
John Fiedler
饰：Alfie Higgins,32 episodes, 1950-1955, / ...
迈克尔哈维
Michael Harvey
饰：Capt. Steve Strong (1950),unknown episodes,
汤姆·波士顿
Tom Poston
饰：The Alkarian,unknown episodes,
哈利贝拉福
Harry Bellaver
饰：Dickson,1 episode, 1954,
杰克逊·贝克
Jackson Beck
饰：Narrator,2 episodes, 1954-1955,
Geoffrey Bryant
饰：Caretaker,1 episode, 1955,
Ralph Camargo
饰：Captain Roy Cowan,5 episodes, 1955, / ...
Ed Bryce
饰：Captain Steve Strong,44 episodes, 1950-1955, / ...
Kort Falkenberg
饰：1 episode, 1955
J. Fred Muggs
饰：Muggs 67th,1 episode, 1955,
Denise Alexander
饰：Betty Corbett,28 episodes, 1951-1955,
Rex Marshall
饰：Lieutenant Saunders,3 episodes,
Joe De Santis
Joe De Santis
饰：Commander Elblas,2 episodes,
卫斯理刘
Wesley Lau
饰：Captain Lane,1 episode, 1953,
罗伯特哈里斯
Robert H. Harris
饰：1 episode, 1954
Marion Brash
Marion Brash
饰：Gloria,1 episode, 1954,
伍德罗夫·帕弗雷
Woodrow Parfrey
饰：1 episode, 1955
吉姆·博尔斯
Jim Boles
饰：1 episode, 1955
Marlene Cameron
饰：1 episode, 1955
James J. Van Dyk
饰：Professor Chambers,1 episode,
Ben Stone
Ben Stone
饰：Major 'Blastoff' Connel,28 episodes, 1951-1955,
Margaret Garland
饰：Dr. Joan Dale,5 episodes, 1950-1955,
Ralph Riggs
饰：Luxor,2 episodes, / ...
Liam Sullivan
饰：Lt. Morse,1 episode, 1953,
克拉汉·丹顿
Crahan Denton
饰：1 episode, 1955
威廉基恩
William Keene
饰：1 episode, 1955
Sydney Smith
饰：1 episode, 1955
Chet Stratton
饰：'Ace of Space' Bradley,1 episode,