Although Cheers operated largely around that main ensemble cast and their interactions with various one-off characters, guest stars and recurring characters did occasionally supplement them. Notable repeat guests included Dan Hedaya as Nick Tortelli and Jean Kasem as Loretta Tortelli, who were the main characters in the first spin-off The Tortellis, Fred Dryer as Dave Richards, Annie Golden as Margaret O'Keefe, Derek McGrath as Andy Schroeder (also referred to as Andy Andy), interchangeably Joel Polis and Robert Desiderio as rival bar owner Gary, Jay Thomas as Eddie LeBec, Roger Rees as Robin Colcord, Tom Skerritt as Evan Drake, Frances Sternhagen as Esther Clavin, Richard Doyle as Walter Gaines, Keene Curtis as John Allen Hill, Anthony Cistaro as Henri, Michael McGuire as Professor Sumner Sloan, and Harry Anderson as Harry 'The Hat' Gittes. Jackie Swanson, who played the recurring role of Woody's girlfriend and eventual wife "Kelly Gaines-Boyd", appeared in 24 episodes from 1989 to 1993.