Two decades before its sequel ‘28 Years Later,’ Danny Boyle teamed with Alex Garland for a dystopian sci-fi flick that featured zombies running after star Cillian Murphy.

The zombie genre has undergone a dramatic transformation over the past two decades, and Alex Garland's work from 28 Days Later to the upcoming 28 Years Later illustrates just how far it's come. What started as a straightforward horror story has become a layered exploration of society,

Two decades after '28 Days Later' revitalized the zombie genre, director Danny Boyle and writer Alex Garland are reuniting for '28 Years Later'. The original film, starring Cillian Murphy, depicted a post-apocalyptic U.