Xtro (1982) - Full Movie

Tony's father Sam's abducted by aliens. 3 years earlier, he returns to earth and seeks his wife and son, but she's been living with someone else. After an awkward reunion, Sam's not the same as when he left, and he begins affecting Tony in frightening ways.

Director: Harry Bromley Davenport
Writers: Harry Bromley Davenport (story), Iain Cassie
Cast: Philip Sayer, Bernice Stegers, Danny Brainin