Amazing, yet sobering film, that packs a real punch despite being 50 years old. Made over the backdrop of the Cold War, this tale still packs a punch today, as even now there is a feeling of a man-made apocolypse just around the corner, and the stupidity of mankind is as present now as it was then. Wonderfully imaginitive use of film tints, beautifully painted panoramas, great model-work, dramatic stock footage, authentic-looking documentary-style bits, and a convincing portrayal of claustrophobia, desperation, and despair. Plus, considering the age & budget of the film, surprisingly convincing and frightening weather effects. A triumph for the director, and an excellent performance by a great cast, including the beautiful, but tragic, Janet Munro.