Arctic researchers discover a huge, frozen spaceling inside a crash-landed UFO, then fight for their lives after the murderous being (a pre-Gunsmoke James Arness) emerges from icy captivity. Will other creatures soon follow? The famed final words of this film are both warning and answer: "Keep watching the skies!" A snappy ensemble. An eerie theremin-infused Dimitri Tiomkin score. Rising suspense. Crisp Christian Nyby direction. All mer