Josh Malina and the ‘Big Bang’ Guest Stars

The legendary Josh Malina joins Jessica Radloff to look back at his recurring role as Caltech President Siebert, which began in Season 4 and continued through the show’s final season. Josh reveals that he originally auditioned to play Leonard — before quickly learning he was too old for the part — and shares how “Big Bang” co-creator Chuck Lorre promised to find a way to bring him back someday as the guys’ boss. Years later, that promise paid off. Plus, Josh talks about returning to “The Big Bang Theory” after “Scandal” wrapped and why he was so excited to be part of the show’s final season. All episodes of “The Big Bang Theory” are available on HBO Max. © 2026 WBEI. THE BIG BANG THEORY characters and elements are © & TM WBEI. Learn more about your ad choices. Visit podcastchoices.com/adchoices