The Caretaker - 1963 - Clive Donner

A Harold Pinter screenplay.

A well-dressed man helps a homeless man and goes so far as to invite him to stay at his house. The well-dressed guy seems a bit peculiar, not especially warm or sympathetic even though he engages in a selfless gesture. About half way through the film some of the ambiguity concerning the character of the well-dressed guy is resolved. But there are many other bizarre aspects of the film that may leave you scratching your head.

As a side note, all of the actors in the film participated without pay, as did the director, since funding such an out of the ordinary film became difficult.

See the film here: https://www.youtube.com/watch?v=4e6x5j_JKWA