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 trial for their actions in the previous film, the former 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.

Leonard Simon Nimoy was an American actor and director, famed for playing Spock in the Star Trek franchise for almost 50 years. This includes originating Spock in the original Star Trek series in 1966, then Star Trek: The Animated Series, the first six Star Trek films, Star Trek: The Next Generation, Star Trek, and Star Trek Into Darkness. Nimoy also directed films, including Star Trek III: The Search for Spock (1984), Star Trek IV: The Voyage Home (1986), and Three Men and a Baby (1987), and appeared in several films, television shows, and voice acted in several video games. Outside of acting, Nimoy was a film director, photographer, author, singer, and songwriter.