The Thing From Another World (1951)
Never has an electric blanket been as important as it is in The Thing From Another World. Without it, The Thing (a plant-based alien that crashes into the north pole), would never have thawed out and gone on a killing spree. The film is a cult classic, even earning a place in the US National Film Registry for its cultural significance. It's notable for some great early special effects and the immortal line "keep watching the skies".