 While Oliver Clark's recurring portrayal of John Doe Number Six is essentially identical to Mr. Herd, the two are never stated to be the same individual.In a nod to the "Mary Tyler Moore Show", John Doe Number Six addresses a character played by Betty White as Sue Ann Nivens, which Betty White's character denies.ALF (1987)

In the 1987 "ALF" episode entitled "Going Out of My Head Over You", Willie visits a psychologist, Dr. Lawrence "Larry" Dykstra, portrayed by Bill Daily.