Count Five and Die [1957] [DVD]

The title refers to how long it takes to die for a person who is caught spying after they have taken a cyanide suicide capsule. So we are in the realm of WW11 in 1944 when the allies had to trick the Germans into thinking the invasion would occur in Holland so that they kept important divisions tied up there. Nigel Patrick plays the British major and Jeffrey Hunter plays the American captain whose task is to sell this fiction to the Germans. ~ imdb