William Shatner and Leonard Nimoy became legends thanks to their acting in Star Trek, but each also got to put on their director’s hat for entries in the Star Trek original cast movie series. Nimoy became the first Trek actor to transition to directing when he took the reins for Star Trek III: The Search for Spock. The Spock star returned to direct Star Trek IV: The Voyage Home. Not to be outdone by his on-screen second-in-command, Shatner received his own directing chance with Star Trek V: The Final Frontier.