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
