who plays zach in the big bang theory
Brian Thomas Smith Brian Thomas Smith (born May 13, 1977) is an American actor and comedian known for playing the dim-witted but kind-hearted Zack Johnson on The Big Bang Theory, and his appearances on Fear Factor and The Amazing Race Season 7. He has also made guest appearances on Two and a Half Men and The 100 Greatest TV Quotes & Catchphrases.
Melissa Rauch Melissa Ivy Rauch (born June 23, 1980)[3] is an American actress and comedian. She is known for playing Bernadette Rostenkowski-Wolowitz on the CBS sitcom The Big Bang Theory.