War Of The Satellites

Dick Miller – Susan Cabot 1958
An extraterrestrial warns humans that any attempt to send a man into orbit will result in the destruction of the planet. Despite his threats, the stubborn U.N. agrees that Mankind must not be stopped and so call in a prominent astro-scientist to begin preparations for the first manned space flight. Unfortunately, he is killed in an accident. Eventually another scientist is given the task. Just before the launch, the supposedly dead scientist shows up with dire warnings.

With Original Trailer