Frank Sinatra (having lost most of his skinny look by now) plays a major who keeps having nightmares of his time of capture during the Korean War, dreams involving Sergeant Laurence Harvey. Angela Lansbury is Harvey's ambitious mother and Janet Leigh is the girl who falls for Sinatra.
The film is about political powerstruggles and brainwashed assassins, and realisticly speaking it doesn't all make that much sense. There are some silly parts, like the Jump in the lake-sequence and that Harvey's girlfriend just happens to be dressed as the Queen of diamonds at a masquerade. There's also a genuinly shocking sequence where Harvey acts against his American operative's enemies (I'm trying not to give too much away here!)
In the remake by Jonathan Demme, starring Denzel Washington, they updated the story and made everything more logical, something that made the whole film fall completely flat. They lost all the fun and creepy stuff from the original, like the women's tea party scene. The original is still a tremendously entertaining and exciting film.
Next: Guys and dolls