Simon Pegg and Nick Frost go on an epic pub crawl. 

The duo, which previously teamed up for comedies Hot Fuzz and Shaun of the Dead, are back for a third film along with director Edgar Wright. 

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The plot revolves around five friends who get back together to complete a lengthy pub crawl -- "12 pubs, 12 pints" -- that they never were able to complete years ago.

Turns out times have changed and so has that small town where they attempted the feat. It appears aliens are involved. 

Watch the trailer below: