The Trainspotting phenomenon started with the Irvine Welsh’s semi-autobiographical novel, part of the 90’s trend of over-the-top gutter punk storytelling. The book was a huge hit in Britain and led to a successful play, then BBC’s edgy Channel 4 agreed to finance fledgling director Danny Boyle’s movie production. Boyle fully realized Welsh’s in-your-face depiction of young, uninhibited heroin addicts, headlined in a star-making role by Ewan McGregor. The film, despite a paltry $3.5M budget, proved just as successful, even in America during its dreadful “family values” years. The Hollywood Reporter gathers the core crew for a look back.