Michael Sheen is a new addition for the third season. He'll interact quite a bit with Rose Leslie's character, but Sheen had previous ties to Christine Baranski—when he was dating Sarah Silverman she told the world he named his private parts after Baranski.
"In the middle of shooting that scene, he looked at me and said, ‘You know, I never said that about my penis. He said, ‘It was Sarah, my then-girlfriend,'" Baranski told EW. "And I said, ‘It's fine. However I'm associated with you is an honor, Michael.'"