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 Hunter, NCIS,NCIS: Los Angeles and Marvin Marvin, among other shows. He more recently had a recurring role on the TV sitcom The Big Bang Theory as Bernadette's father, Mike, and also appeared in four episodes of The Ranch as Roger Hollister.
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