Star Trek IV: The Voyage Home

Star Trek IV: The Voyage Home is a 1986 American science fiction film, the fourth installment in the Star Trek film franchise based on the television series Star Trek. The second film directed by Leonard Nimoy, it completes the story arc begun in Star Trek II: The Wrath of Khan (1982), and continued in Star Trek III: The Search for Spock (1984). Intent on returning home to Earth to face consequences for their actions in the previous film, the crew of the USS Enterprise finds the planet in grave danger from an alien probe attempting to contact now-extinct humpback whales. The crew travel to Earth's past to find whales who can answer the probe's call.

After directing The Search for Spock, Nimoy was asked to direct the next feature, and given greater freedom regarding the film's content. Nimoy and producer Harve Bennett conceived a story with an environmental message and no clear-cut villain. Dissatisfied with the first screenplay produced by Steve Meerson and Peter Krikes, Paramount Pictures hired The Wrath of Khan writer and director Nicholas Meyer. Meyer and Bennett divided the story between them and wrote different parts of the script, requiring approval from Nimoy, lead actor William Shatner, and executives at Paramount.