- Robert Eddison - Grail Knight
- Richard Young - Fedora
- Alexei Sayle - Sultan
- Alex Hyde-White - Young Henry
- Paul Maxwell - Panama Hat
- Isla Blair - Mrs. Donovan
- Vernon Dobtcheff - Butler
- J.J. Hardy - Herman
- Bradley Gregg - Roscoe
- Jeff O'Haco - Half Breed
- Vince Deadrick Sr. - Rough Rider
- Marc Miles - Sheriff
- Ted Grossman - Deputy Sheriff
- Tim Hiser - Young Panama Hat
- Larry Sanders - Scout Master
- Will Miles - Scout #1
- David Murray - Scout #2
- Frederick Jaeger - World War One Ace
- Jerry Harte - Professor Stanton
- Billy J. Mitchell - Dr. Mulbray
- Martin Gordon - Man at Hitler Rally
- Paul Humpoletz - German Officer at Hitler Rally
- Tom Branch - Hatay Soldier in Temple
- Graeme Crowther - Zeppelin Crewman
- Luke Hanson - Principal SS Officer at Castle
- Chris Jenkinson - Officer at Castle
- Nicola Scott - Female Officer at Castle
- Louis Sheldon - Young Officer at Castle
- Stefan Kalipha - Hatay Tank Gunner
- Peter Pacey - Hatay Tank Driver
- Pat Roach - Gestapo
- Suzanne Roquette - Film Director
- Eugene Lipinski - G-Man
- George Malpas - Man on Zeppelin
- Julie Eccles - Irene
- Nina Armstrong - Flower Girl
- Vic Armstrong - German Soldier (uncredited)
- Roy Beck - German Customs Official (uncredited)
- Dickey Beer - German Agent (uncredited)
- Jack Carter - SS Soldier (uncredited)
- Graham Cole - Henchman (uncredited)
- Bert Crome - Zeppelin Passenger (uncredited)
- Peter Diamond - German Soldier (uncredited)
- Hugh Elton - Zeppelin Passenger (uncredited)
- Albert Evansky - Librarian (uncredited)
- Norman Gay - Zeppelin Passenger (uncredited)
- Nick Gillard - Tank Crewman Hit by Periscope (uncredited)
- Martin Grace - German Soldier (uncredited)
- Paul Heasman - Castle Brunwald Officer (uncredited)
- Barrie Holland - Airport Customs Official (uncredited)
- Colin Hunt - German Officer (uncredited)
- Ronald Lacey - Gestapo (uncredited)
- Derek Lyons - German Soldier (uncredited)
- Paul Markham - Airport Passenger SA Officer (uncredited)
- Wayne Michaels - German Agent (uncredited)
- Orla Pederson - Gestapo (uncredited)
- Lee Richards - Zeppelin Passenger (uncredited)
- Michael Sheard - Adolf Hitler (uncredited)
- Lee Sheward - Radio Op (uncredited)
- Tip Tipping - Tank Crewman (uncredited)
- Chris Webb - Castle Brunwald Radio Officer (uncredited)
- Sheb Wooley - Screaming Soldiers (archive sound) (uncredited)
- Steven Spielberg
- Frank Marshall
- Michael D. Moore
- George Lucas
- George Lucas
- Tom Stoppard
- Philip Kaufman
- Jeffrey Boam
- George Lucas
- Mike Fenton
- Frank Marshall
- Robert Watts
- Elliot Scott
- Arthur F. Repola
- John Williams
- Ben Burtt
- Richard Hymns
- E. Larry Oatfield
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