CBS Entertainment president Kelly Kahl said the network is in "preliminary discussions" with producers Warner Bros. Television to continue one of TV's top comedies.

The Big Bang Theory is heading into the 2018-19 broadcast season with a question mark: Will season 12 be the end of CBS' nerdy comedy?

The multicamera effort has been renewed through its upcoming 12th season, but no determination has been made as to whether the Warner Bros. TV series will wrap its run.

"We don't believe it's the final year. We are in preliminary discussions to renew the show with Warner Bros.," CBS Entertainment president Kelly Kahl on Sunday told reporters when asked about the future of the series during his stop at the Television Critics Association's summer press tour.

Big Bang Theory, created by Chuck Lorre and Bill Prady, is heading into its 12th season in the fall after producers Warner Bros. Television inked the cast to new deals last year said to be worth $900,000 apiece, plus lucrative points off the show's backend and overall deals. The series' five original stars also took $100,000 pay cuts to help bring co-stars Mayim Bialik and Melissa Rauch to parity.

"One could easily presume [season 12] would be the end of the series," Lorre told The Hollywood Reporter in August 2017 while acknowledging that producers never imagined they'd get to season 11. The season 11 finale featured the wedding between Jim Parsons' Sheldon and Bialik's Amy in what many viewers presumed would be the end game for the show. The episode teed up a 12th season to explore the couple's big scientific breakthrough.

In May, sources told THR that WBTV and CBS have had some conversations about potentially continuing Big Bang Theory beyond season 12, which would require signing the stars to new mega-deals to return to the comedy from Steve Molaro and showrunner Steve Holland. The show continues to be a ratings cash cow, with the network using it to launch prequel spinoff Young Sheldon this season. (The latter series, which Molaro oversees as showrunner, has already been renewed for the 2018-19 season after becoming a top 10 comedy this season among the advertiser-coveted adults 18-49 demographic.)