sentences:  Rabb's production of "The Royal Family" was filmed for the PBS series "Great Performances" on November 9, 1977; this version was released on DVD.Rabb replaced George Grizzard, who left due to prior commitments, in the role of Tony Cavendish in the Broadway revival of "The Royal Family" shortly after the revival opened and appeared in the PBS production as well.Rabb appeared in "Cheers" playing an imaginary spy and then a poet in the episode "The Spy Who Came In For A Cold One".