Real world article
(written from a production point of view)
The Star Trek – 30th Anniversary Trial Pack was a special VHS collection released in the UK by CIC Video on 2 January 1996, to mark the 30th anniversary.
The collection contained the pilot episodes of all four live-action series at the time, namely "The Cage", "Encounter at Farpoint", "Emissary", and "Caretaker".
Other similar collections include Star Trek - The Three Beginnings and Star Trek - The Four Beginnings, both of which replace "The Cage" with the first volume of TOS released ("Where No Man Has Gone Before" and "The Corbomite Maneuver").