<P> Clinton O. `` Casey '' Sander ( born July 6 , 1956 ) is an American actor known as the character `` Captain '' Jimmy Wennick on the short - lived TV series Tucker . His television credits also include Criminal Minds , The Golden Girls , Grace Under Fire , Home Improvement , Malcolm in the Middle , Rules of Engagement , Sons of Anarchy , Mad Men , Silicon Valley , The Newsroom , Buffy the Vampire Slayer ( on which he portrayed the father of Xander Harris ) , Hunter , and Marvin Marvin , among other shows . He has a recurring role on the TV sitcom The Big Bang Theory as Bernadette 's father , Mike . </P>
<P> Clinton O. `` Casey '' Sander ( born July 6 , 1956 ) is an American actor known as the character `` Captain '' Jimmy Wennick on the short - lived TV series Tucker . His television credits also include Criminal Minds , The Golden Girls , Grace Under Fire , Home Improvement , Malcolm in the Middle , Rules of Engagement , Sons of Anarchy , Mad Men , Silicon Valley , The Newsroom , Buffy the Vampire Slayer ( on which he portrayed the father of Xander Harris ) , Hunter , and Marvin Marvin , among other shows . He has a recurring role on the TV sitcom The Big Bang Theory as Bernadette 's father , Mike . </P>
who plays howard 's father in law on big bang
who plays howard 's father in law on big bang
Clinton O. `` Casey '' Sander
Clinton O. `` Casey '' Sander