The Big Bang Theory co-creator isn’t sure how the series will end In an interview with US Weekly at the Television Industry Advocacy Awards (via Screen Rant), The Big Bang Theory co-creator Bill Prady reveals that he isn’t entirely sure how the long-running series will end when it wraps production after its 12th season. “We’re approaching the final season the same way we’ve approached the 11 seasons before: with no planning whatsoever.