Penny has a strange relationship with her family in The Big Bang Theory, and one mystery doesn't help matters.

From Penny and Sheldon to supporting stars like Beverly and Mary Cooper, all The Big Bang Theory's heroes have one line that ...

Adult Sheldon's appearance on Young Sheldon marked a sentimental nod to The Big Bang Theory while wrapping up the Cooper clan story. Fans speculate Leonard's fate given his absence in the finale ...

When The Big Bang Theory first introduced Leonard Hofstadter and Penny, few could have predicted that their unlikely relationship would become one of the series' greatest things.

While The Big Bang Theory has plenty of great characters, not all of them stick around until the end of the show.

Leonard's love interest in The Big Bang Theory was not well-received by fans. The character quickly became one of the most ...

Which speaks more to the idea that he died at some point, possibly due to the various health issues that he brought up in the 12 years The Big Bang Theory aired, as opposed to Leonard and Penny ...

The Big Bang Theory had quite a few impressive guest stars during its run. While a handful of guest stars appeared in recurring roles or had a big memorable guest appearance, but others appeared in ...

The Big Bang Theory's Leonard Hofstadter was the glue that held his group of friends together. No one helped and supported Sheldon and his unusual demands more than Leonard. He would even stick to ...