The original version of the pilot, produced to convince NBC to buy "Star Trek" as a series, runs approximately 5 minutes longer and has a different introduction, several additional lines of dialogue and reaction shots, transitional introductions a la Quinn Martin ("Act I", "Act II", etc.), and different opening and closing credits. This has never been shown on television, but has circulated among "Star Trek" fans worldwide. It has been unofficially released on public domain videos, and was released on the 2009 Blu-Ray set of the original series (in the Season 3 collection)
