In the 1970s and early 1980s, it was VHS vs Betamax. But in the 2000s, with companies keen to build on the success of DVD, a fresh movie format war sparked. In one corner? It was Blu-ray. In the other? HD DVD. The latter was best positioned to emerge victorious - but it all came to a head over a few days at the start of 2008.

Dan Gilroy had built up a career as a Hollywood screenwriter, but only moved to directing in his 50s. His low budget project Nightcrawler broke many of the conventions of feature films - and it'd involve shooting in a lot of place, in not very much time...

Stories of both are told in this episode.

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