Don’t expect Sheldon Cooper to cross paths with William Shatner anytime soon.
In a new interview, Star Trek‘s Captain Kirk revealed that he has previously turned down an offer to guest star on The Big Bang Theory because he wasn’t pleased with how the show wanted to use him.
“I’ve had several conversations with the creators, and what they wanted me to do, didn’t seem to be exactly right, so I said ‘find something that’s better,'” Shatner told Digital Spy. “They may have taken umbrage at that, I’m not sure.”
Shatner then went on to clarify that he had been asked to play a heightened version of himself, but wasn’t comfortable with what that would entail.
“They wanted me to play myself a little obliquely, and they said it would work out, but I needed more assurance on that.”
Shatner wouldn’t be the first Star Trek alum to appear on Big Bang. The late Leonard Nimoy famously lent his voice to the Season 5 episode “The Transporter Malfunction,” in which a Spock action figure spoke to Sheldon in his dreams. Meanwhile, George Takei cameoed in Season 4. Star Trek: The Next Generation‘s Brent Spiner and LeVar Burton have also put in appearances, while Wil Wheaton has recurred since Season 3.
TVLine has reached out to CBS for comment.