• 
  Danny DeVito

  Alan Swathmore
• 
  Martin Short

  Tucker Kerwin (13 episodes, 1979-1980)
• 
  Richard Brestoff

  Mr. Adamson (1 episode, 1980)
• 
  Adrienne Hampton

  Ginger (1 episode, 1979)
• 
  Michael Currie

  The Judge (1 episode, 1979)
• 
  Stuart Margolin

  Phil Kramer (1 episode, 1980)
• 
  Wilfrid Hyde-White

  Emerson Marshall (13 episodes, 1979-1980)
• 
  Jonathan Frakes

  Kip Dunbar (1 episode, 1979)

• 
  John Houseman

  Professor Kingsfield (1 episode, 1980)
• 
  Georgia Engel

  Wendy Turner (1 episode, 1979)
• 
  Alley Mills

  Leslie Dunn (13 episodes, 1979-1980)
• 
  John Getz

  William Simmons (1 episode, 1979)
• 
  John Ritter

  Chick (1 episode, 1980)
• 
  K.C. Martel

  Stevie #1 (1 episode, 1980)
• 
  Cloris Leachman

  Mary Nicholson (1 episode, 1979)

• 
  Tom McLoughlin

  Vincent (1 episode, 1979)
• 
  Tim Thomerson

  Johnny Danko (13 episodes, 1979-1980)
• 
  Joe Regalbuto

  Eliot Streeter (13 episodes, 1979-1980)
• 
  Andonia Katsaros

  Mrs. Conklin (1 episode, 1979)
• 
  Richard Roat

  Mr. Simms (1 episode, 1980)
• 
  Juanin Clay

  Yvonne Winslow (1 episode, 1980)
• 
  William Prince

  Mr. Milestone (1 episode, 1979)
• 
  Jack Gilford

  Julius Barnes (1 episode, 1979)