20 Hidden Sci-Fi Movie Gems You Can Watch On Netflix

2. Upstream Colour

Shane Carruth's follow up to Primer is this, 2013's Upstream Colour, a beautiful, sensual, expressive mediation on love and identity. Part thriller, part sci-fi drama, part everything else, the film is truly hard to pin down or even describe, such is its artistic flair, poise, and shifting form.

Carruth again directs, stars, produces, edits, designs, co-writes and composes the film, ensuring that this is his own entirely unique vision. Upstream Colour is, like Primer, deliberately obscure, and Carruth shades the film with lashings of lush, ponderous mystery.

This is bound to annoy cinema-goers who long for the "answers" to films (an idiotic exercise for the most part), but Colour adheres to the idea that most of life's great questions are unanswerable, and thus it attains a sense of transient beauty, an ethereal quality that only belongs to the greatest of sci-fi creations.