The Big Bang Theory is much-loved for its fantastic ensemble, but two key cast members were a little late to the party.

After the end of "The Big Bang Theory," Melissa Rauch kept one specific prop from her time as Bernadette ...

While "The Big Bang Theory" creators tweaked the cast's appearances over the 12 seasons, they used one prop for Kaley Cuoco's ...

The Big Bang Theory introduced many characters over the years, but some minor ones are barely remembered by fans.