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.

Spock is a fictional character in the Star Trek media franchise. He first appeared in the original Star Trek series serving aboard the starship USS Enterprise as science officer and first officer and later as commanding officer of the vessel. Spock's mixed human–Vulcan heritage serves as an important plot element in many of the character's appearances. Along with Captain James T. Kirk and Dr. Leonard "Bones" McCoy, he is one of the three central characters in the original Star Trek series and its films. After retiring from active duty in Starfleet, Spock served as a Federation ambassador, and later became involved in the ill-fated attempt to save Romulus from a supernova, leading him to live out the rest of his life in a parallel universe.