Jim Parsons and Johnny Galecki Jim Parsons and Johnny Galecki

Leonard and Penny may have finally gotten engaged on The Big Bang Theory, but bigger developments are in store for Thursday's Season 7 finale (8/7c, CBS).

"There are a lot of moves made by different people in the finale," executive producer Steve Molaro tells TVGuide.com. "This season is more of a cliff-hanger ... and what happens affects everyone, not just one person."

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