Big Bang Theory stars Simon Helberg and Melissa Rauch still have some serious chemistry! Helberg and Rauch, who played ...

Revord stole the show as Sheldon's plucky twin sister Missy Cooper on Young Sheldon, the spin-off to The Big Bang Theory, and ...

But the show's very talented cast helped lend The Big Bang Theory more substance, especially as the show went on. Here's what ...