Comedy duo Simon Pegg and Nick Frost team up again in Paul, an out of this world comedy about two comic book geeks trying to help a smart-ass alien escape to his mothership.

The film is a celebration of Sci-Fi and features more than the occasional reference to science fiction movie classics.

So, to celebrate the release of Paul on Blu-ray and DVD, weÂ’ve got hold of Pegg and Frost's five favourite Sci-Fi scenes and characters. Enjoy!