Star Trek IV The Voyage Home (1986)

Directed by Leonard Nimoy and starring William Shatner, Leonard Nimoy, De Forest Kelley, James Doohan, George Takei, Walter Koenig, Nichelle Nichols, Mark Lenard and Catherine Hicks.

2-disc Special Edition DVD bought in 2003

6-film 7-disc Star Trek Motion Picture Blu-ray Set bought in 2009
118m 51s

http://moviecentrallibrary.blogspot.co.uk/2015/03/star-trek-original-motion-picture.html

DVD extras - 

Audio commentary by Leonard Nimoy and William Shatner
Text commentary by Michael and Denise Okuda
Time Travel: Art of the Possible (11mins)
The Language of the Whales (6mins)
A Vulcan Primer (8mins)
Kirk's Women (8mins)
Future’s Past: A Look Back (27mins)
On Location
Dailies Deconstruction
Below-The-Line: Sound Design (12mins)
From Outer Space to the Ocean (15mins)
The Bird of Prey
Interviews from 1986 promo kit
Roddenberry scrapbook
Featured Artist: Mark Lenard
Production gallery
Storyboards
Theatrical trailer