George Peppard as Tuxan

Michael Sarrazin as John David Welles / Peter Bellamy

Christine Belford as Nicole Devon

Cliff Potts as Carl Mosely

James Olson as Senator Stanton

Tim O'Connor as Frank Gossage

James McEachin as Bender

Alan Oppenheimer as General Hackett

Roger Dressler as Charlie Kitchen

Ty Haller as Henshaw

Anna Hagan as Dr. Plover

Hagan Beggs as Dr. Hager

John Destry as Zabrinski

Milos Zatovic as Dr. Zahl

Don Granbery as Technician

Robin Coller as Secretary

Bob Meneray as MP Sergeant

Richard Sergeant as MP

Ed Collier as Nicole's Doctor

John Mitchell as MP

Martin Moore as MP

Don Vance as Reporter

William Nunn as Reporter

Peter Lavender as Reporter

Barry Cahill as Reporter