Fail-Safe (1964)

Oh...my. What a heavy movie. Left me going, "Oh...my." Heh... really, it was amazing. I had to think for an hour before I decided if I liked it or not, but then I decided I did. Immensely. My only real complaint? Walter Matthau's idiot character. I swear I wanted to grind him up into little pieces and then jump on him. 4 stars.