Portrait of Rebecca.
Deceased sister of Hester Van Hooten.
When a vital package lands on the roof of the Van Hootens' isolated house, CONTROL agents Maxwell Smart and 99 are sent to retrieve it. In a remarkable coincidence, 99 bears a striking resemblance to Rebecca and Hester becomes convinced that 99 is in fact Rebecca returned to her despite Hester's husband Jason's assurances that he had buried her 20 years earlier.
Rebecca had married Sebastian, a man who Hester loved, and died mysteriously on her wedding night after drinking a glass of wine. With Hester now attempting to poison 99 in the same way, it seems obvious that she killed her sister in a fit of jealousy and Max makes to arrest her - or Jason who Max claims had a financial motive - until a surprise confession from Hogarth, the family butler, clears them both.
Portrayed in flashback by Barbara Feldon [Uncredited, Episode #129: "Rebecca of Funny-Folk Farm"].