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

James Earl Jones: Why don't you and your friends come to Comic-Con with me?
Sheldon: Really?
James Earl Jones: Of course. And San Diego is right across the border from my favorite city on Earth, Tijuana.... where I'm taking you every night!
Sheldon: Ay-yi-yi.
James Earl Jones: Ay-yi-yi. Bang. Bang.

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.