Bob Newhart Dick Loudon Actor Mary Frann Joanna Loudon Actor Steven Kampmann Kirk Devane Actor Julia Duffy Stephanie Vanderkellen Actor Tom Poston George Utley Actor Thomas Hill Jim Dixon Actor Rebecca York Cindy Parker Devane Guest Star William Sanderson Larry Actor William Lanteau Chester Wanamaker Actor Stella Stevens Guest Star Peter Scolari Michael Harris Actor Tony Papenfuss First Darryl Actor Ernie Sabella Guest Star John Reilly Guest Star John Voldstad Second Darryl Actor Richard Venture Guest Star Lois De Banzie Guest Star Garry Goodrow Guest Star Michael Edmonds Guest Star John C. Becher Guest Star Will Mackenzie Director John Tracy Director Rod Daniel Director Jim Drake Director Dick Martin Director Donna Wheeler Director Donn Wheeler Director Linda Day Director Emily Marshall Writer Barry Kemp Writer Barbara Hall Writer Sheldon Bull Writer Miriam Trogdon Writer Shelley Zellman Writer Ken Peragine Writer Nat Mauldin Writer Howard Friedlander Writer