An inventor of a new bomb sight gets involved in a spy plot nad has his house invaded by an assortment of people. This is a British spy thriller that has some lighter moments. There are good performances from John Mills, Alastair Sim and Carla Lehman. The best performance though is from a very young George Cole in his first film role.
3/5 
Leslie Banks
Alastair Sim
John Mills
George Cole
Michael Wilding
Frank Cellier
Muriel Aked
Wally Patch
Hay Petrie