The Beverly Hillbillies S01E06 - Trick or Treat

Grannie wants to go home because folks is so unfriendly no one has come to call. Jed convinces her they should call on them, and they find that people welcome them and give them all manner of gifts when they show up on Halloween in their normal hillbilly clothes. Also, Jed works on getting Pearl to come visit while she's trying to get hitched to the oilman and find a young man for Jethrine.