A woman traveling with her parents to her uncle's house crash near his house. Her parents die but she survives. She stays with her uncle, but it becomes clear that he and his son are planning something sinister for her.
A crew of interplanetary archaeologists is threatened when an alien creature impregnates one of their members, causing her to turn homicidal and murder them one by one.
Three specimens from a female race of aliens crash land in England and abduct four earthlings by accident. They decide to use the opportunity to start experimenting. On the males.