The 39 Steps

Richard Hannay (Kenneth More) arrives in London and saves a nanny from a hit-and-run driver before discovering that she's actually a spy trying to stop the theft of military secrets. After the woman is killed, Hannay goes to Scotland in an attempt to stop the plot's leader himself. Along the way he has several narrow escapes, dodging both the police and assassins, as well as getting handcuffed to a girls school instructor (Taina Elg) who doesn't believe his wild tale.