EW Staff
September 10, 2010 at 04:00 AM EDT

The fourth season of the hit nerd-com — newly moved to Thursday night — picks up a few months after the curious first encounter between Sheldon (Jim Parsons) and the Sheldon-esque Amy Farrah Fowler (Mayim Bialik) in May’s finale. So is Sheldon about to get a girlfriend? Not quite. “There is not a romantic bone in [Sheldon’s] body,” says exec producer Chuck Lorre. And while Penny (Kaley Cuoco) and Leonard (Johnny Galecki) will remain exes for now, expect Howard (Simon Helberg) to turn over a new leaf thanks to the return of both ex-girlfriend Bernadette (Melissa Rauch) and Katee Sackhoff, as the imaginary embodiment of his conscience. (Star Trek‘s George Takei pops up too.) “Katee speaks to him [about] moving into a real relationship,” says Lorre. “It’s time for him to grow past [being] the skeevy Porky’s kind of character.” SEPT. 23

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