The Karate Kid S01E12 - The Gray Ghosts

The trio goes to San Francisco where they find a group of senior citizens known as the "Gray Ghosts", so named because they were enthuiasts of the classic car by the same name. They learn the shrine may be in possession of a reclusive tycoon named Frump. Daniel has to work with one of the Gray Ghosts, who is very different from the stereotypes Daniel has of old ladies.