Bruce Davison is Wyck Thayer, chairman of the Susan Biddle Ross Foundation in 3 episodes. First: The Foundation (Season 8 Episode 1).
Bruce Jarchow is the Doctor in The Pilot (Season 4 Episodes 23 and 24) and Mooney in The Millenium (Season 8 Episode 20).
Bruce Kirschbaum is Guy in Police Lineup in The Beard (Season 6 Episode 16).
Bruce Mahler is rabbi Glickman (AKA rabbi Kirshbaum). He appears in 3 episodes: The Postponement (Season 7 Episode 2), The Serenity Now (Season 9 Episode 3) and The Finale (Season 9 Episode 24).
Bryan Cranston is Tim Whatley, the dentist who converted to judaism just for the jokes. He is in 5 episodes. The first: The Mom & Pop Store (Season 6 Episode 8)
Cary Elwes is David, Beth Lookner’s husband in The Wait Out (Season 7 Episode 23).
Chaim Jeraffi is the Jiffy Park Guy in The Wig Master (Season 7 Episode 18) and the Jiffy Dump Guy in The Muffin Tops (Season 8 Episode 21).
Christopher Aguilar is Burmese Boy in The Chicken Roaster (Season 8 Episode 8).
Christopher Carroll is Maitre d' in The Watch (Season 4 - Episode 6).
Christopher Darga is the driver in The Lip Reader (Season 5 Episode 6).
Christopher Michael Moore is the Studio Guard in The Trip: Part 1 (Season 4 Episode 1).