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Three seasons, 79 episodes and a world of Trekian minutia. That's what the Star Trek The Original Series (TOS) generated from 1966 until its untimely cancellation in 1969.

Of course, Star Trek never really left us or the screen. Over the last five decades, it's appeared in cartoon, numerous films, spin-off series, print games and more. Now, the show's fiftieth anniversary (the official date is September 8) is being celebrated in stamps, books, live experiences, restorations, a new series and even a moving documentary dedicated to one of the series most illustrious creations: Mr. Spock.

While the documentary film, For the Love of Spock, which was written and directed by Nimoy's son, Adam, is primarily a look back at the life and career of the late Leonard Nimoy, it's a Trek film at its core and features interviews with numerous Star Trek stars and devotees, including Seinfeld actor Jason Alexander.

To celebrate the September 9 theatrical and video on demand release of For the Love of Spock, the filmmakers have released exclusively to Mashable a new, never before seen clip of Alexander answering a multitude of Star Trek trivia questions. Alexander's clip will be available with the documentary as an iTunes Extra.

Most of the trivia questions Alexander tackles are from TOS, but a few delve into the films that followed. Regardless, Alexander is a Trek savant, correctly answering all but one question. The one he missed, by the way, is one of the easiest questions, "Who is Spock's father?" We'll put his missing it down to having one to many Romulan ales before the shoot.

The documentary is now available for pre-order in iTunes.