In West Virginia, Nick Baxter (Robert Walker Jr.) hitches a ride with some truckers. However, when he spots two men in a car waiting by the roadside, he struggles with the driver to get out. Soon after, the big rig comes to a stop; the driver's partner is horrified to find him frozen ... in the middle of Summer. More mysterious deaths by freezing are reported. Vincent tracks the Invader down and captures him. Baxter admits he has contracted a disease from his world that is killing him slowly, but it is a quick death for any human with whom he comes into contact. But as innocent as he desperately tries to appear, the smooth-talking young "man" still seems a trifle careless about whom he happens to touch. He and Vincent flee on foot from other Invaders into the hills, where they come upon a young woman, Madeline Flagg (Lynn Loring, Roy Thinnes' future wife). Her father Gus (R. G. Armstrong) agrees to call the sheriff from the nearest telephone for $10. Vincent ties Baxter up, but when David loses consciousness due to an earlier head injury, Baxter convinces Madeline to untie him. She guides him to where he claims witnesses can confirm his innocence. Vincent and Gus finally rescue her. They see a flying saucer unloading its cargo. When Gus tries to sound a fire alarm Baxter kills him and then runs to the departing saucer. But his reception is not what he had expected; he is vaporized.
