Audrey Landers' sister Judy Landers appeared on the show as different characters - twice - in season two's Angels on the Run (1978) and season four's Love Boat Angels (1979).
Cissy's doll that she hid her stolen jewelry in is the same doll from season one's Night of the Strangler (1976).
Elissa Leeds (Cissy Canfield) later appeared as a different character in season four's Catch a Falling Angel (1980).