Ultimately, Penny And Sheldon Become Best Friends On The Big Bang Theory In the Season 9 episode "The Celebration Experimentation," Amy tries to throw a surprise party for Sheldon ... and it doesn ...

The Big Bang Theory ... neighbor Penny (Kaley Cuoco). While Sheldon’s eccentric behavior and unparalleled intellect became one of the show’s defining elements, the arrival of Amy Farrah ...

The Big Bang Theory ... to out-argue Sheldon, but Sheldon finds he’s not the only one annoyed when he goes to spend time with Penny instead. It turns out that Penny, Amy, and Bernadette all ...

Stream the latest Big Bang Theory episodes ... some understandable Sheldon quirks holding things up). Both families came to celebrate, putting aside their differences. Penny saved the day by ...

Educating Penny Sheldon ... of a pool," says Sheldon when Leonard insists he call off his experiments. "I thought the 'Bazinga' was implied." After a breakup (of sorts) with Amy Farrah Fowler ...

Chuck Lorre has a preference when it comes to where he will and will not sit, sort of like Sheldon Cooper on 'The Big Bang Theory' ...

The sudden attention from the media and the university bothers Sheldon, while Amy is saddened by unflattering pictures of her in the news, so Raj convinces her to get a makeover. Leonard accidentally ...

Penny, Amy, and Bernadette plan a trip to Las ... also shows up in The Big Bang Theory when Sheldon decides to ban Penny from his apartment for breaking his rules, like sitting in his spot on ...