Winston Churchill
Doc
Daddy-O
General Sorenson
Billy Patrick
Ted Kitteridge
Himself / Narrator / H.G. Welles
Gen. Willoughby
Bill King
Supt. Bob McLaine
Commander W.P. Anderson
Mitch Brenner (archive footage) (uncredited)
Mr. Payatta
Pongo (voice) (archive footage)
Edward Adeane
Jack Bailey
'Black Jack' Bouvier
Clint Tolliver
Steve Donegin
Marian Casey
Palmer
Christopher Tauling
Shamus McCoy
Marko
Frank Brand
Trader Horn
Lieutenant Bob Robson
Grady
Self
Jason Carlyle
Hank Brackett
Travis McGee
Peter Reaney
Lee Allen
Brynie MacKay
Scobie Malone
Curry
Chuka
Peter McDermott
Bruce Templeton
Himself
Mike Harper
Brian Ian "Boysie" Oakes
John Cassidy
Major Walter Gerber
Captain Jack Savage
Mike Mitchell
Les Mangrum
Col. Hollis Farr
Mitch Brenner
Sir Francis Drake
Pongo (voice)
H. George Wells
Ross Taford
Charles
Mike Randall
Garwood B. Jones
Sir David Karfrey
Ralph Halloran
Herbert Ellis
Lem Sutter
John Brodie Evans (as Rodney Taylor)
Cpl. Gwilym (uncredited)
Israel Hands
Jack Janiero