So it was a really pleasant surprise when [Independence Day] turned out to be a successful film. I don't know if you've heard that they're going to be re-releasing it next Fourth of July in 3-D. I've actually only seen it once, and it was in Hawaii, in a little theater in Oahu shortly after it was released. But Roland Emmerich is a really smart guy, and he makes really fun movies to watch.

It wasn't exactly a cattle call. I had an agent, and they were seeing people for the parts, so my agent said, "Here's the script, see if there's anything that speaks to you." And I did, and I called my agent and said, "I think this character Data is kind of interesting," and she said, "Well, okay, I'll get you the appointment with Junie Lowry." I had to read with the casting agent first, 'cause nobody really knew me then. Then after that, I had, I think, six different auditions for the role. And finally it was me [on Star Trek].

Generally, I have to be able to get the lines out of my mouth without making a mistake before I go to sleep.

I've gotten such good feedback from that [re-team with Wil Wheaton for Big Bang Theory appearance], and I hardly did anything.

Joey being one of my finest performances ever. Matt LeBlanc's basically doing the same thing right now, playing himself on Episodes. When I did Joey, I really leaned on them to make me the biggest ass they possibly could, because, frankly, everyone in their heart of hearts thinks of themselves that way. Or at least I do, anyway.

Comedy really is my bread and butter, even when I'm doing a serious character, with the exception of Outcast. I have found very little humor in this character. Most of the time, what I do, somewhere there is comedy in it.

I don't know if the character's come back and it was someone else playing it, or maybe they never did it again. But I loved it. It was a great part [The Joker] to play.