(archive footage)
Dr. Research (archive footage) (uncredited)
Bishop Finley
Prof. Norman E. Van Zandt
Chief Pilot Bob Shea
Link
David Stafford
Tom Stewart
The Writer
The Fiction Writer
Russell Wade
Mr. Fiction Writer
Martin Random /
Insp. Levering
William B. Travis
Introductory Narrator (voice) (uncredited)
Dr. David Reed
Dr. Jerry Lockwood
Gerald MacTeam
Henry Murdoch
John Putnam
Major Degan
Dr. Jeffrey Stewart
Lt. (j.g.) Joe Rodgers
Capt. Paul Hansen
Steve Smith ("Whispering Smith")
Gerald Kean
Dr. Roland Cook
William 'Bill' King
Gil Stanton
John Goode
Ross Stewart
Martin Abbott
Charles Winslow / Charles Winslow Sr.
Nipper Wilson
Tom Farrell
Tom Manning
Owen Vail
Bill Adams
Bill - Soldier
Mr. Langford
R.I.C. Kay
Tommy Van Steel
Jeff Sommerfield
Dr. Geoffrey Burton
David Hewitt
Doctor Jackson
Dr. Jimmy Krueger
Curt Stanton
Tom Gillespie
Clint Kelly
Thomas Jefferson
Geoff Montgomery
James Houston
Perry Allerton
'Pug' Braddock
Professor John Welden
Jack West
Duncan Macrae
