If you are a Star Trek fan (or really just interested it what it's like to be an actor) I highly recommend watching "The Captains". It is a documentary that William Shatner produced, wrote, directed, etc. about the captains of every Star Trek iteration to date. The movie is beautifully done and Shatner does an amazing job of mixing a light fun attitude with serious questions and issues surrounding being not only on Star Trek itself but being someone who the crew and audience constantly looked to. Parts of it are pretty strange but even then I enjoyed it. He goes into some pretty deep questions and I'm not sure he always gets the kinds of answers he's looking for, but he has such a fantastic chemistry with everyone that it's a pleasure to sit back and watch the giants of the various Star Trek universes interact.
Plus, come on, you know you want to see William Shatner in a box: