Watch The Big Bang Theory - Season 10, Episode 9 - The Geology Elevation: A geologist coworker's MacArthur Genius fellowship award leaves Sheldon stone cold jealous.

The Big Bang Theory Season 1. Episode 1. 8 Recap: . Think back to just six months ago, when Leonard and Penny were tying the knot again and the major cliffhanger was whether Leonard's dad and Sheldon's mom had hooked up. Things have changed a lot, right? Back on September 1.

Amazon.com: The Big Bang Theory - Season 1-9 Like Rachel on Friends and Felicity on, well, Felicity, viewers of The Big Bang Theory have often associated Penny's look with her hair. That's why it came as a shock.

Penny was still residing in her apartment and Sheldon and Leonard's. Amy was living alone in hers. Bernadette and Howard hadn't welcome baby Halley. Raj was living off of his parents' wealth to stay in a place he couldn't afford. But by the end of tonight's episode, Raj had officially—though temporarily—moved in with Penny and Leonard. And consider this: Sheldon no longer lives in his apartment (Did we ever think we'd see the day?); Amy and Sheldon now live together in Penny's place; Penny officially moved in with Leonard; Bernadette gave birth to Halley. Watch High School Musical 3: Senior Year Online Hollywoodreporter.

The fifth season of the American sitcom The Big Bang Theory was originally aired on CBS from September 22, 2011, to May 10, 2012, over 24 episodes. TM & © 2016 Turner Broadcasting System, Inc. A Time Warner Company. All Rights Reserved. TBS.com is a part of Turner Entertainment Digital which is a part of.

Watch The Big Bang Theory Full Episodes Online. Instantly find any The Big Bang Theory full episode available from all 10 seasons with videos, reviews, news and more! Watch Keith Lemon: The Film 4Shared on this page. Sheldon and Amy go through a period of adjustment with their new living arrangement. Howard and Bernadette are forced to vacation at home when she falls ill and keep.

Just one of those changes can be risky for a show—to have no less than four major changes in the span of six months? That's practically unheard of.

PHOTO: Michael Yarish/Warner Bros. And yet, it still feels like The Big Bang Theory we know and love. You know that saying—as much as things change, they also remain the same. We're just seeing a more authentic side to all the characters that have been seasons in the making. Everyone is growing up and their lives are shifting, but the writers (certainly earning their well- deserved paychecks) have done it so seamlessly that it doesn't feel forced. Sheldon moved in with Amy as an experiment, which was pretty much the only way Sheldon was ever going to give up his spot on the couch on a permanent basis. In the process, he learned to accept—and even enjoy—living with Amy in a new place.

Considering that Shamy first had coitus over a year ago, seeing them move in together was both monumental and most importantly, natural. Penny and Leonard have discovered that they have more marital issues to work through than they bargained for.

Now with Raj in the mix, things will likely come to a head. And while we've seen Bernadette experience some very real difficulties with motherhood, the writers have found a way to make baby Halley a part of the show without turning it into Three Men (Howard, Raj, and Stuart) and a Baby. At a time when watching television can feel like a chore, The Big Bang Theory continues to defy expectations. You don't need a scientist to figure that out. The Big Bang Theory airs Thursdays on CBS.