Leonard Nimoy most famous for the role of Spock actually did some directing including Star Trek 3 the search for Spock and of course Star Trek 4, the voyage home but in a complete change of subject matter he also directed "Three men and a Baby".
did you also know that in the Star Trek Pilot, Spock was not the first officer, that was Majel Barrett who later became Nurse Chappel, the voice of the computer, Lwaxana Troy and of course Gene Rodenberry's Mrs!
Yes, I did know all that (I am a geek after all) before the Trek films, he actually directed an episode of TJ Hooker, the American cop show starring William Shatner.
Nimoy was actually my birthday twin, both of us born March 26th.
Did you know: Apparently without the persistence of Lucille Ball (of I Love Lucy fame) who recognised its potential when others rejected it, Star Trek may never have got off the ground (pun intended).