- Rick Jason - Ambassador Harcourt
- George Chakiris - Angelo Spinelli
- Dennis Burkley - Earl Dowd
- Harold Gould - Andrei Zernov
- Hildegard Knef - Princess Sophia Valosky
- Quinn K. Redeker - Capt. Curt Weller
- Matthew Faison - Howard
- Henry Darrow - Alec Belmont
- Roy Stuart - Maitre d'
- George Murdock - Leo Atkins
- Jack Hogan - Gen. Titus Morgan
- Anne Haney - Mrs. Dunlap
- Earl Boen - Davis
- Linda Carlson - Dr. Ann Mallory
- Michael Fairman - Sergei
- Frank Bonner - Henry 'Buck' O'Connell
- Elena Verdugo - Mrs. Coleman
- Jordan Christopher - Ren Lepard
- Jordan Christopher - Norton Scott (as Jordon Christopher)
- Bruce Tuthill - First IFF Agent
- Alex McArthur - Antov
- Sid Haig - Gretz
- Patti Yasutake - Field Reporter
- Patti Yasutake - Teldar Employee
- Carla Borelli - Cecilia Kemper
- Charles Robinson - James McNeil
- Peter White - Darrell Robison
- Doug McClure - Russell Sinclair
- Beverly Washburn - Woman in Buzz Blade movie
- Art LaFleur - Rodney Hobart
- Linden Chiles - Sanderson North
- Arthur Taxier - Gertz
- Ted Gehring - J.C. Granger
- James Whitmore Jr. - Colonel Sykes
- Alan Haufrect - Gary Garver
- Bob Herron - Sarge (uncredited)
- John Saxon - Dirk Fredericks
- Madison Arnold - Henchman with fruits
- Thomas Bellin - Doctor
- John Hostetter - IFF Agent Jack
- Ruth Kobart - Waitress
- Arlen Dean Snyder - Col. Clayton
- Jane Kaczmarek - Penelope 'Penny' Squire / Princess Salana Sharese Khan
- Richard Herd - Jake Williamson
- Georgann Johnson - R.D. Frampton
- Nancy Stafford - Colleen Donnelly
- Alan Cooke
- Christian I. Nyby II
- William Wiard
- Sidney Hayers
- Kate Jackson
- Rod Holcomb
- Peter Lefcourt
- Richard Raskind
- Bill Froehlich
- Joel Steiger
- Lisa Seidman
- Lee Maddux
Kate Jackson interpreta a Amanda King en la serie.
Bruce Boxleitner interpreta a Lee Stetson en la serie.
Beverly Garland interpreta a Dotty West en la serie.
Mel Stewart hace el papel de Billy Melrose.
Martha Smith hace el papel de Francine Desmond.
Paul Stout interpreta a Philip King en la serie.
Greg Morton interpreta a Jamie King en la serie.
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