Villain(s)  Deformed astronaut

Actor(s):  Henry Hite, June Travis, Phil Morton, Peter M. Thompson

Brief Description  Monster a Go-Go (1965) is an infamous, low-budget science fiction horror film about an astronaut named Frank Douglas whose space capsule crash-lands on Earth. Douglas is missing, and a radioactive, mutated giant begins roaming the countryside, leaving behind victims whose bodies are gruesomely shriveled and dried up.

Plot:
The movie was originally a 1961 independent project titled Terror at Halfway directed by Bill Rebane, which ran out of funding and stalled. In 1965, exploitation pioneer Herschell Gordon Lewis purchased the unfinished footage to use as a cheap second feature, filming new scenes, recording voiceover narration, and altering the plot. Because original cast members were missing, characters vanish or morph randomly, and one actor even returns to play his own brother. An experimental space capsule returns to Earth off-course in a rural field. The pilot or recovery team find the capsule abandoned, and a helicopter pilot is discovered dead, his body horribly shriveled and distorted as if cooked by intense radiation. Colonel Steve Connors leads a military and scientific investigation alongside figures like Dr. Chris Manning. They piece together that astronaut Frank Douglas had been given heavy doses of a radiation-repelling experimental serum before launch.

Scientists deduce that the atmospheric conditions combined with the serum mutated Douglas into a towering, 7-to-10-foot-tall, radioactive creature with severe skin damage. The lumbering monster wanders the area, occasionally killing or terrifying locals, while officials bicker in echoey, poorly recorded dialogue scenes about tracking it down and engineering an antidote. The film culminates in a sudden, bewildering conclusion. After a lengthy search through the sewer and underground tunnels of Chicago, just as authorities corner the creature, a sudden, deadpan voiceover narration informs the audience that the monster has mysteriously vanished into thin air—or that the man they found wasn't Douglas after all—leaving the entire mystery completely unresolved before cutting abruptly to black.