This is a film based on the short story by Robert A Heinlein called All You Zombies. It's a fantastic film with a portrayal of paradoxes and the extent to which they can become convoluted if Time Travel was possible. And when I say Time Travel, I mean with the ability to interfere with the past and future, and not just witness. It's a tough movie to get your head around so be prepared to go back and watch it again. The cast is fantastic. _Ethan Hawke_ delivers as always. But we need to talk about _Sarah Snook_ - man she can act! She's the heart of the film and brings together the first half of the film so convincingly. It's rare that a film based on Time Travel is made without ugly holes in the plot. Predestination is one of those rare ones which is complete in its beginning and end.