The Man Who Knew Too Much [Criterion Collection] [Blu-ray]

While vacationing in Switzerland, Britons Leslie Banks and Edna Best befriend jovial Frenchman Pierre Fresnay. Not long afterward, Fresnay is murdered. He whispers a secret in Banks' ear before expiring. This is witnessed by several sinister foreign agents, who kidnap Banks' daughter to keep him from revealing what he knows.