The extras on this DVD include a commentary by director Nicholas Meyer and Manny Coto (showrunner for Star Trek: Enterprise), "James Horner: Composing Genesis," "Collecting Star Trek’s Movie Relics," "A Tribute to Ricardo Montalban," and "Starfleet Academy: The Mystery Behind Celi Alpha VI."
The Search for Spock Released in 1984, this film follows on the heels of the previous one, where Spock dies from radiation poisoning. When Kirk finds out that Spock transferred his Katra, or his essence (soul), to Dr. McCoy's mind before entering the radioactive chamber, it sets them off to return to the Genesis planet to retrieve Spock's body to return him to Vulcan to reunite it with his Katra. They steal the Enterprise to try to accomplish this before McCoy is overwhelmed by Spock's consciousness, which could cause his death. This film, while not as great as the previous one, is still very well done and enjoyable. Leonard Nimoy directed this film.
The extras include commentary by Ronald D. Moore and Michael Taylor, "Industrial Light & Magic: The Visual Effects," "Spock: The Early Years," "Star Trek and the Science Fiction Museum and Hall of Fame," and "Starfleet Academy: The Vulcan Katra Transfer."
The Voyage Home Released in 1986, from a timeline standpoint this story takes place three months after The Search for Spock. This is also directed by Nimoy. This adventure has a large cylindrical object heading for Earth. It ends up taking up orbit around the Earth as it is signaling the planet with mysterious sounds and is causing disruptions in the global power system, causing extreme weather patterns and evaporation of the oceans.
The Enterprise officers, who are in exile on the planet Vulcan for the theft and destruction of the Enterprise in the prior film, now decide to return to face charges. They use a seized Klingon Bird of Prey and head back to Earth. When they hear Starfleet's warning and the signal from the alien ship, Spock understands that it is the song from a long extinct humpback whale. They devise a plan to use the sun to slingshot back in time to return with a whale.