Ex Machina (stylized as ex_machina) is a 2015 British science fiction psychological thriller film written and directed by Alex Garland in his directing debut. It stars Domhnall Gleeson, Alicia Vikander and Oscar Isaac. Ex Machina tells the story of programmer Caleb Smith (Gleeson) who is invited by his employer, the eccentric billionaire Nathan Bateman (Isaac), to administer the Turing test to an android with artificial intelligence (Vikander).