The Big Bang Theory Season Premiere Pics, Poster: New Night. Same Theory.

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Look out, Bones!

Take cover, Community!

Sheldon, Leonard and company are invading the 8 p.m. time slot on Thursdays this fall, as The Big Bang Theory makes a major move. But, don't worry fans, this poster should quell any fears you may have about other changes to the show. Just read its tagline:

Fourth Season Poster

The sitcom returns with new episodes on September 23. As previously reported, Mayim Bialik will reprise her role as Sheldon's love interest on the premiere - but Penny will also find herself involved in this pair's dating life.

See what we mean in one of the two pics below from "The Robotic Manipulation."

Awkward Date
Feelin Good

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.

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TBBT Quotes

Leonard: I'm not a crybaby.
Penny: Toy Story 3?
Leonard: They were holding hands in a furnace!

Two tea bags in one cup? You're not at a rave.

Sheldon