Caretaker, The (1963)

aka: The Guest

Naive and lonely Aston (Robert Shaw) rescues the homeless and manipulative Davies (Donald Pleasence), inviting him to stay at his rundown family home. Aston's brother and guardian, Mick (Alan Bates), dislikes the shiftless Davies, but comes to see him as someone to unload the house onto when Aston proposes that Davies become its caretaker. Mick, fed up with his responsibilities, hopes Davies' duties as caretaker will extend to caring for his brother as well.