Star Trek IV: The Voyage Home (1986)

In "Star Trek IV: The Voyage Home," the crew of the starship Enterprise travels back in time to the 20th century to retrieve two humpback whales in order to save Earth from an alien probe. Along the way, they must adapt to the primitive conditions of the past and navigate the challenges of a foreign era. The film blends humor with science fiction elements, making it a unique installment in the "Star Trek" franchise.