This is Morgan Fairchild's final episode as Susan Taylor.
Bickley: (reading one of his greeting cards) Your pet rabbit died. Poor little Muffet. Your two choices are... eat it or stuff it.
Mork has invited a monkey named O'Keefe into the apartment, a slap-happy reference to the show's Associate Producer, James O'Keefe.
Although credited, Elizabeth Kerr(Cora) does not appear in this episode.
Yes, that is THE David Letterman.