Season 5, episode 30, aired on April 24, 1964.
Married couple, Bob and Millie Frazier, wake up in an unfamiliar house. They remember only that they both drank too much at a party the night before, and that on the way home, a large shadow had appeared over their car.
They soon discover that the house is mostly props — the telephone has no connection, the cabinetry is merely glued-on facing, the refrigerator is filled with plastic food. They hear a girl's laughter and go outside to find the child. However, once outside, they discover that the town is deserted. They find fake grass and trees, search for help in a vacant church, and ring the bell in the church's bell tower hoping someone will come to their aid. The exasperated Millie begins to think that perhaps she crashed their car on the way home, and they are now in Hell. They hear a train whistle and, thinking they have finally found a way out of the town, rush to the train station and board the empty train. As the train leaves the station (revealed to be in "Centerville"), they begin a light-hearted conversation, vastly relieved. However, when the train soon comes to a stop again in Centerville, they realize it has only gone in a circle, and they are back where they started.
They leave the train and return to the center of town, once again hearing a little girl's laughter, and now pursued by a shadow. The shadow is cast by the hand of a little girl – a little girl giant - whose father brought them back from Earth to be her pets.
****The cache you seek is a micro. ****