Given that “The Big Bang Theory” has expanded the game of Rock Paper Scissors (the full name is now Rock Paper Scissors Lizard Spock) and had Penny give Sheldon a stroke for Christmas by providing him with a napkin autographed by everyone’s favorite Vulcan, can a guest appearance by Leonard Nimoy be far behind?

Unfortunately, according to creator Chuck Lorre, such an appearance doesn’t seem too likely.

“I would love that,” said Lorre, “but I think Mr. Nimoy is now in retirement. He did actually sign the napkin, though. ‘To Sheldon, Leonard Nimoy.’ He was very nice about that. He got a kick out of the idea that that was the gift that she gave him that brought Sheldon to his knees. He was really tickled by that, and our deal with him was, ‘For your efforts, maybe we can make some money for the charity of your choice.’”

The charity in question was The Beit T’Shuvah, a residential treatment center in Los Angeles for Jewish alcoholics and addicts, and the napkin went up for auction on Sunday evening during the center’s Steps to Recovery Gala at the Beverly Hilton, where it earned a final bid of $1,100.

But the big question is, is Nimoy a fan of the show?

“I don’t know,” admitted Lorre. “But I do know that he got a kick out of the storyline.”

I still say to keep your fingers crossed…and, c’mon, Chuck, it can’t hurt to ask. The new “Trek” movie will be coming out around the same general time frame as the season finale for “The Big Bang Theory,” and given that Nimoy clearly has a good sense of humor about his place in the pop culture pantheon (see his appearances on “The Simpsons” for proof), it seems like the stars are aligned perfectly for such a cameo.