Trying to compile a list of the best sci-fi movies of the 21st century is far from easy, and there's plenty of debate about what should top the list - but some movies are likely to be present on basically any list. Ex Machina is one of those, a mind-twisting thriller from 2015.
Now, it's been added to the streaming catalogue on Amazon Prime Video in the UK, where US viewers could already catch it, making it easier than ever for Prime subscribers to catch this brilliant movie.
