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

The headline news? Chuck’s spy mama is Sarah Connor — a.k.a. Linda Hamilton, who plays Mary Bartowski. ”The heart of the season is Chuck’s search for his mom,” says exec producer Chris Fedak, ”and what that means for his relationship with Sarah.” And let there be no mistake, Chuck (Zachary Levi) and Sarah (Yvonne Strahovski) will be in a relationship this season. All season. ”We explored every possible obstacle between them [in seasons 1-3],” notes fellow exec producer Josh Schwartz. ”Our audience was ready for them to be together.” Chuck’s sister, Ellie (Sarah Lancaster), will be expecting a mini Awesome with husband Devon (Ryan McPartlin); romance will blossom between Morgan (Joshua Gomez) and Casey’s (Adam Baldwin) newfound daughter, Alex (Mekenna Melvin); and one of the show’s landmarks will be no more. ”The yogurt shop is gone,” says Fedak, who hedged when asked if it’ll be replaced by longtime sponsor/savior Subway. ”That’s TBD — very TBD.” SEPT. 20

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