Lee Majors as Col. Steve Austin
Richard Anderson as Oscar Goldman
Martin E. Brooks as Dr. Rudy Wells
Lindsay Wagner as Jaime Sommers
Alan Oppenheimer as Dr. Rudy Wells
Quinn K. Redeker as Frank
Than Wyenn as Ambassador Mahmound
John de Lancie as Diver
Farrah Fawcett as Major Kelly Wood
Jack Colvin as Dr. Charles Leith
Bruce Glover as Capt. Voda
Lloyd Bochner as Gordon Shanks
Curt Lowens as Anton Brandt
William Sylvester as Admiral Prescott
Paul Carr as Timberlake
Hank Stohl as A.F. Maj. Phillips
Hank Brandt as Fowler
Bob Neill as Eric
Jennifer Darling as Peggy Callahan
Noah Keen as Joe Canton
Barry Cahill as Det. Olmstead
James Ingersoll as Hal
Fred Lerner as Bill Wooters
Henry Jones as Dr. Chester Dolenz
Ken Swofford as Dan Kelly
Pamela Hensley as Cynthia Grayland
Jane Merrow as Irina Leonova
Severn Darden as Apploy
Stefanie Powers as Shalon
Martha Scott as Helen Elgin
David Sheiner as Arnold Blake
Mills Watson as Edgar Webster
Ford Rainey as Jim Elgin
Austin Stoker as Captain
W.T. Zacha as Air Force. Sgt. Roberts
Martin Speer as David Levy
Walter Brooke as Dr. Tellman
Trent Dolan as Jacobs
Jimmy Joyce as Dr. Richmond
Charles Cyphers as Faler
William Scherer as Ed Pierce
Virginia Gregg as Mrs. Nelson
Vince Howard as Nuclear Center Guard
Jim Raymond as 1st Co-Pilot
Eddie Fontaine as Frank Sullivan
Scott B. Wells as Doctor
Jim B. Smith as Bob Elliott
Stuart Nisbet as Harry Johnson
Terry Leonard as Stoner
Gary Lockwood as Hopper
Music by the great Kevin MacLeod