Where There's a Will Gilligan's Island : Season 3 Episode 6

Mr. Howell revises his will, and leaves a large chunk of his estate to each castaway. They decide to throw him a party to show their appreciation, but when he overhears them talking about which one of them is going to have to ""cut the pigs throat"" he thinks they are planning to kill him in order to collect their inheritance. Later, he discovers that they have actually trapped a wild boar in an effort to serve him bar-b-que spareribs as a surprise.