The Flintstones S06E07 - The Great Gazoo

Wilma and Betty want to go out to eat at a very expensive restaurant, while Fred and Barney claim they cannot afford it. Soon after, Fred and Barney find a space alien who has crash-landed on Earth, who says that he will help them until he is able to go back to his home planet. Gazoo promises to give Fred and Barney some money for the dinner date to that expensive restaurant, but when the bill arrives, Gazoo is nowhere to be found, leaving Fred and Barney to wash the dishes at the restaurant.