Earth vs. the Flying Saucers (1956)
Extraterrestrials traveling in high tech flying saucers contact a scientist as part of a plan to enslave the inhabitants of Earth
Desire Me (1947)
Released from a POW camp at the end of WW2, a French soldier tricks the wife of a fellow POW into believing her husband was killed by the Germans and seduces the grieving woman, but the dead husband eventually returns home
Giant from the Unknown (1958)
A very large, degenerate, Spanish conqueror is freed from suspended animation by lightning and goes on a killing spree in a small town
The Giant Claw (1957)
Global panic ensues when it is revealed that a mysterious UFO is actually a giant bird that flies at supersonic speed and has no regard for life or architecture