Star Trek IV: The Voyage Home was released in theaters, becoming a significant part of the Star Trek film series and exploring themes of environmentalism and communication.
Principal photography and production of Star Trek IV: The Voyage Home began, involving the cast and crew from the previous Star Trek films.
Paramount Pictures officially announced the development of Star Trek IV: The Voyage Home, continuing the storyline from Star Trek III.
A mysterious alien probe emits signals threatening Earth due to the extinction of humpback whales.
Captain Kirk and his crew are found guilty of stealing the Enterprise and are sentenced, but they escape custody to embark on their mission.
Using the Klingon Bird of Prey, the crew travels back in time to 1986 San Francisco to find and bring humpback whales to the future.
The crew captures two humpback whales from 1986 Earth to save the species from extinction in the 23rd century.
The crew returns to the future with the whales aboard the Bird of Prey to save Earth from the destructive alien probe.
The humpback whales communicate with the probe, calming it and preventing Earth's destruction.
