Unfortunately the filmmakers introduce a sci-fi element in the second half that deflates much of the interpersonal tension and shifts the focus from the subtleties of mind control to the vagaries of time and space.

The biggest lesson of The Endless is how we can allow our lives to loop around in one crappy cycle until we cop out.

Despite an imaginative concept, the narrative feels surprisingly bland, even when the pieces begin to fall into place - and when there's no quick punchline to fall back on, the film suffers.

In trademark Benson-Moorhead fashion, the film is a genre-fluid experience that boldly chooses not to be bound by horror restrictions, instead allowing its viewers to relate to the emotion that hits home the hardest.