Self – Interviewee
Gentleman
Interviewee
Gus the Theatre Cat
Chairman
Old King Norway
Jack the Ripper
Bernard Quigley
Dapper man
De Lacey
Brig. Dougal Munro
Bernard
Sir Lawrence Dobson
Montgomery Bell
Jim Bloggs (voice)
Lewis Serrocold
Dr. John H. Watson / Narrator
Cambridge
Lord Chelmsford
Prof. Bernard Quatermass
Sir Henry Bartle Frere
Scudder
Thomas Lindmer
Inspector Carson
Monsignor Blaise Meredith
Colonel Bertie Cook
Mike McAllister
Cleon Doyle
Canning
General Kitchner
Mr. Parker
Michael
Sir Philip MacDonald
The Moorman (Colonel)
Field Marshall Sir Douglas Haig
Lord William Hamilton
Inspector Franz Bulon
Colonel Stuart Valois
Wing Commander Hayes
Ezra Fitton
Masterman Finsbury
Smedley-Taylor
General Boyd
Tommy Tyler
Maitland
Lt. Col. Clifford Southey
Captain Morgan
Jacko Palmer
Mitch Evers' Golf Caddy (uncredited)
Father Michael Keogh
Father
Lt. Col. Basil Barrow (Battalion Commander)
Superintendent Graham
Major Harvey
Captain Anson
Cpl Tubby Binns
Dr. Howard Latimer
Supt. Mike Halloran
London Carriage Driver
Platon Karataev
Puncher Roberts
John Hampden
Commandant Fraser
Albert Parkis
Pat Reid
William Mossop
Phillip Davidson
Self - Commentator
Terence Sullivan
Tom Denning
Lt. Cmdr. Armstrong
Bassett
Alfred Polly
Captain R.F. Scott R.N.
Jim Ackland
George Boswell
The Voice
Pilot Officer Peter Penrose
Jim Colter
Narrator (voice)
Billy Mitchell
British Flyer
Lt. Taylor RN
William Wilberforce
Ordinary Seaman Blake / Shorty Blake
Bobby Jessop
Flt·Lieut. Perry
Young Bill
Jack
Peter Colley as a Young Man
Jim Connor
Cpl. Bert Dawson
Lord Guilford Dudley
Albert Brown
Ralph Summers
Robert Miller
Ronnie Blake
Arthur Haughton
Tony Smithers
Bobby Poskett
Ernest Elton
Fred Bolton
Golightly
John Mills