Natalie Schafer of Gilligan's Island also guest stars as Mrs. Roberts.
Joan Van Ark(Georgie) is probably best known as Valene Ewing of Knots Landing.
Ron Rifkin also went on to Knots Landing as a guest star but, is probably best known as Dr. Carl Vucelich (1995-1996) on ER.
JoAnna Cameron(Vanessa) is probably best known for playing superhero Isis on "Isis" and "Shazam!"
Peter Donat was most recently William Mulder on the X-Files.