Allied spies and Nazi Agents insinuate themselves at a Scottish cottage (converted to a wartime hospital) with interests on an inventor's nearly perfected bomb sight.
as John Barrington
as Mrs. Barrington
as Helen Barrington (as Carla Lehman)
as Charles Dimble
as Flt·Lieut. Perry
as Ronald
as Alan Trently
as John Forest
as Miss Fernery
as Evans
as Mrs. Trimm
as Dr. Truscott
as Mrs. Stokes
as Lady Wrapping Parcels For The Bazaar (uncredited)
as Senior RAF Officer (uncredited)
as Scotland Yard Inspector (uncredited)
as German Agent (uncredited)
as Ministry Official (uncredited)
as Scottish Police Inspector (uncredited)
as German Agent (uncredited)
as RAF Officer (uncredited)
as Scottish Fisherman (uncredited)
