"Dark & Long" is a single by Underworld, originally released in 1994 in the United Kingdom. It entered the UK Singles Chart at #57 on 25 June 1994 for one week. The track made its first appearance as the opener for Dubnobasswithmyheadman earlier in the year.
The "Dark Train" mix subsequently became better known due to its use in the 1996 film Trainspotting.
Dark & Long (Dark Train) appears in a scene of Trainspotting (1996) when the main character Mark Renton is going through heroin withdrawal.
Dark & Long (Dark Train) appears on Northern Exposure by Sasha & John Digweed (1996).
An alternate version simply called "Dark Train" appears as an unlisted, hidden track on the Everything, Everything DVD (2000)
Dark & Long (Dark Train) was previously only available on the "Dark & Long" and "Born Slippy .NUXX" singles, until it was released worldwide on CD in 2003 as part of the 1992-2002 Anthology.
The Dark Train video, directed by John Hollis & Graham Wood (1994), appears on the UK released video compilation Kiteless: A Tomato Project.
The Most 'Ospitable video, directed by Dirk Van Dooren & Graham Wood (1994), appears on the UK released video compilation Kiteless: A Tomato Project.
The same video versions of Dark Train & Most 'Ospitable also appear on the US released compilation, Footwear Repairs by Craftsmen at Competitive Prices.
Dark & Long (Hall's Mix) appears on Fused - Further Directions in Dance (2CD compilation) (1997)
Dark & Long (Dark Hard) appears on Trans Europe Express 4 (2CD & 2LP Compilation) (1995)
Dark & Long (Dark Train Mix) appears on Tribal Gathering (a CD Compilation) (1995)
Dark & Long (Dark Train Mix) appears on Trainspotting 2 - The Original Soundtrack (a CD Compilation) (1997)
An exclusive remix of Dark & Long appears on Razormaid - Level 6 (a US subscription only CD Compilation)
Dark & Long (Dark Train) as well as the Darren Price and High Contrast Remix both appeared during the athletes' march at the opening ceremony of the London 2012 Olympics and on its soundtrack album Isles of Wonder.