Night of the Big Heat

In this sultry sci-fi thriller, a heatwave ravages a remote Scottish island in the middle of winter, where a stand-offish scientist from the mainland discovers that extraterrestrial aliens are to blame for the blistering temperatures and bizarre occurrences on Fara. As tensions rise among the island's residents, including a suave writer, his timid wife, and a sultry secretary with a past, they band together with a grumpy scientist to stop the alien invasion before it's too late.