The 25 greatest sci-fi movies

When it comes to science fiction, there's no shortage of thrills and chills on the big screen. But how do you narrow down your picks of the greatest sci-fi movies? Well, we've attempted to do just that. Spanning decades, we've gone back to the '60s and worked our way through to the present day, looking to Hollywood and beyond. 

You'll find plenty of classics in this directed by the greats, from Stanley Kubrick to Steven Spielberg and Ridley Scott to the Wachowski sisters, but we've also looked further afield to releases that may have slipped under your radar. From alien invasions to space travel and time-hopping, it's all here in our guide to the greatest sci-fi movies to grace our screens.