Spock Laughing In Star Trek IV Wasn't Out Of Character, It Completed The Vulcan's Resurrection Story

Spock (Leonard Nimoy) laughs at the end of Star Trek IV: The Voyage Home, but it's a crucial moment that completes the Vulcan's resurrection. Directed by Leonard Nimoy, Star Trek IV was the highest-grossing Star Trek movie until J.J. Abrams' Star Trek (2009) reboot. A true mainstream crossover hit, Star Trek IV was also the conclusion of the unofficial "Genesis Trilogy" that began with Spock's death in Star Trek II: The Wrath of Khan and continued in Star Trek III: The Search for Spock.