Clinton O. "Casey" Sander (born July 6, 1955 or 1956) is an American actor whose roles include "Captain" Jimmy Wennick on the short-lived TV series Tucker, Bernadette's father, Mike on The Big Bang Theory and Roger Hollister in four episodes of The Ranch. His credits also include appearances on 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. (Via Wikipedia)