This yarn - based on sci-fi legend Robert Heinlein's short story All You Zombies - is never less than intriguing, even if it does threaten to unravel at the slightest tug on a thread of loose logic.

The film leaps into a dizzy abyss of temporal paradoxes, made all the dizzier by its transgender premise - a modern Tiresias myth plaited into a Möbius strip.

One of Ethan Hawke's strengths as an actor is his willingness to jump between arthouse fare and B-movie genre fodder.

It’s a fascinating investigation into the major science-fiction theme of time travel and the sometimes mindbending possibilities therein.