Of course, when you see [ musical numbers] in the movie [Out To Sea ], it's cut into a lot with other scenes, but we shot the number straight through, so here I am doing it, and sitting right in front of me in the audience was Donald O'Connor. And I was, like, "Oh, my God, I can't believe I'm performing a musical number in front of Donald O'Connor," who's one of the greats of the silver screen. But it was a thrilling experience, it really was.

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

I did learn a lot from [ Felicia Day], though, and I was able to usurp some of her talent.

A couple of years ago, I went to see a production of Wicked in San Francisco with a friend of mine, one that Patty Duke was in, and he said, "Do you want to meet her?" And I said, "Yeah!" And I went backstage, and she walked out of her dressing room, looked at me, and said, "I know you." And I went, "Well, uh, yeah, I was in My Sweet Charlie." And she said, "Yeah! You were the guy in the car on the road!" And I was. It was amazing.

I think I worked an average of about 10 minutes a day [in Big Bang Theory series]. It took longer to get to the studio than I actually worked. So I regard the driving there as the actual job. The work itself was just fun.

Initially I objected to the Data makeup. I said, "Why do I need this makeup? Why can't I just look like me?" In fact, I said to Gene Roddenberry, "Don't you think that by this time in history, they would've figured out how to make skin look like skin?" And he said, "What makes you think that what you have isn't better than skin?" And I went, "Um, okay."

Earl Mills is probably the best role I've ever been given in a film. And it was a great experience to work with Halle [Berry] and Klaus Maria Brandauer, an Austrian actor who's a hero of mine. Martha Coolidge directed the movie [Introducing Dorothy Dandridge], giving me another shot, and it was an amazing experience.