Where Do Mermaids Go?

S2 E14: Reuben and the Partridges stop off for a picnic on the way home as they unwind after several weeks on the road. At the picnic spot they meet Jenny, a free spirit, just traveling around and doing her thing. The Partridges strike up a friendship with Jenny and she goes home with them and stays for a few days. Jenny, however, is really very wealthy and before she hits the road again, she leaves the Partridge family a bank book containing one million dollars! The kids are thrilled with this unexpected windfall, but Shirley is skeptical and wants to return the gift. Shirley calls the police to have them find Jenny. In the meantime, the family is having a hard time handling their new wealth. The Partridges go back to their picnic spot and find Jenny there. They give back the money and return to their normal lifestyle.