
108 minutes
12/23/1946
Wartime tale of a group of British scientists efforts to develop the first radar system. They did it just in time for it to be used in the Battle of Britain against the might of the Nazi Luftwaffe. Without it the little island could well have been overrun.

Ralph Richardson
as Prof. Heatherville

Raymond Huntley
as Prof. Laxton-Jones

John Laurie
as Dr. McVitie
Ernest Jay
as Dr. Dainty

David Tomlinson
as Mr. Watlington

Finlay Currie
as Sir Duncan Wills
Norman Webb
as Dr. Wainwright

Michael Hordern
as Lt. Cmdr. Lowther

Pamela Matthews
as Mrs. Watlington
Joan Haythorne
as Mrs. Laxton-Jones

Joan Young
as Mrs. McVitie
Ann Wilton
as Mrs. Dainty

Richard Attenborough
as Jack Arnold

David Hutcheson
as Squadron Leader Sowerby

Patrick Waddington
as Group Capt. Aspinall

Cyril Smith
as Flight Sgt. Cox

James Hayter
as Warrant Officer
D. Bradley Smith
as Air Marshal Cotter

Robin Bailey
as Wives' Escort Officer
Hugh Dempster
as Sqdn. Ldr. Slatter
Kenneth Buckley
as Sqdn. Ldr. Buckley

Paul Carpenter
as Flt. Lt. Argylle

Anthony Dawson
as Flt. Lt. Norton
Robert Long
as Flying Officer Davies
Richard Mantell
as Air Vice-Marshal

Murray Matheson
as Wing Cdr. Allen
Anthony Wyckham
as Flying Officer Ogden

Peggy Evans
as Daphne Adams
Ingrid Forrest
as Penelope Birkenshaw
Geraldine Keyes
as Phyllis Hammond

Vida Hope
as WAAF Flight Sergeant
Sonia Elverson
as WAAF Teller

Robert Wyndham
as Major
Andrew Blackett
as Captain

Bill Owen
as Paratroop Sergeant (as Bill Rowbotham)
Tony Arpino
as 1st Commando
Peter March
as 2nd Commando
Bob Elson
as 3rd Commando
Roger Keyes
as 4th Commando
Trevening Hill
as 5th Commando
Edward Hodge
as 6th Commando
Joseph Almas
as Dr. Klemmerhahn
Arthur Rieck
as Lt. Hense
Ernest Urbank
as 1st Sentry
Karl Morel
as 2nd Sentry

Marjorie Rhodes
as Mrs. Arnold
Edward Lexy
as Sir Desmond Prosser

Hugh Pryse
as Sir Nicholas Hathaway

O.B. Clarence
as Old Retainer

Aubrey Mallalieu
as 1st Club Member

Desmond Roberts
as 2nd Club Member
Guy Belmore
as 3rd Club Member
Alvar Liddell
as BBC Announcer (voice)

Kenneth More
as Bomb Aimer (uncredited)

Arthur Mullard
as (uncredited)
Ian Selby
as Man at Dance (uncredited)