A spider escapes from an isolated desert laboratory experimenting in giantism and grows to tremendous size as it wreaks havoc on the local inhabitants.
Giant robots from Venus invade Chicago. Stranded in the deserted city are Frank and Nora (who has recently attempted suicide).
A mad scientist transforms a panther into a man-like creature that escapes and goes on a murderous rampage.
A giant prehistoric praying mantis, recently freed from the Arctic ice, voraciously preys on American military at the DEW Line and works its way south.