Blu-ray Disc

Blu-ray Disc (BD or Blu-ray) is a high-definition home entertainment format on the standard 120mm optical discs. Launched in 2006, it competed briefly, but fiercely from 2006 to 2008 with HD DVD before becoming the standardized high-definition home entertainment format.

Star Trek releases on Blu-ray commenced in with season one of The Original Series. Star Trek: The Next Generation and Star Trek: Enterprise are currently being released. CBS have commented that a Star Trek: Deep Space Nine Blu-ray release is a possibility. In a post on Twitter, Michael Okuda commented "We've heard that CBS execs would love to give DS9 the HD treatment, if sales for TNG HD continue to support it". 

Regions
Blu-ray releases, much like DVDs are divided into separate regions, to restrict the areas specific discs can be played. The following is a guide to the regions and which areas of the world they relate to: