But what if one pair straight up never met while filming? And what if they didn't actually meet for the first time until ...

The Big Bang Theory beginning any other way than Sheldon, Leonard, and Penny tumbling into an unconventional friendship across the hallway is unimaginable.

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

The Big Bang Theory leaves its fair share of plot threads dangling, but this one is more emotional than all the others ...

There is one issue that almost every sitcom faces and The Big Bang Theory was ready to tackle it. I'm glad they changed it to ...

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.

Johnny starred as Leonard Hofstadter from the first episode of The Big Bang Theory ... on The Big Bang Theory, the actor has had other roles including voice work in films Ice Age: Continental ...

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 ...

It was all love for The Big Bang Theory when the series ended ... Johnny portrayed experimental physicist Leonard Hofstadter on the long-running sitcom, who falls in love with his neighbor ...