A native chief's daughter comes to the island with her family and wants to marry Gilligan, but first he must pass the "marriage test"--which becomes more complicated when another suitor arrives and challenges Gilligan for her hand.
Ginger, Mary Ann, and Mrs Howell decide to hold a beauty contest to see who will be named "Miss Castaway." Gilligan has to cast the deciding vote, so everybody else tries to influence his vote.
A Latin American dictator is exiled to the island, and he immediately declares himself dictator of the island, with Gilligan as his puppet leader in training.
Gilligan wins a million-dollar sweepstakes and is invited to the Howell's country club. After feeling lonely he issues IOUs to the others so they may also attend. He quickly misplaces the winning ticket and they all get evicted.
The professor's data indicates that the island is sinking, but the men don't want to break the news to the women, who have the men in the middle of a landscaping project. The Professor ends up hurting his back, helping with a rock garden.
The castaways find two crates of silent film equipment in a sunken boat in the lagoon. The Professor then comes up with the idea to make a film telling their story, send it out on a raft, and hope for rescue.
A Howell Industries stock collapse leaves the Howells broke. The fellow castaways try to cheer them up and try to teach them how to live like the working class.
Two Soviet cosmonauts land on the island, way off course from their target. The castaways hope to leave the island with them when they call their submarine, but the cosmonauts have other ideas.
The Skipper trains Gilligan to be his replacement leader in case he is captured by savages. But when The Skipper is actually captured by savages, can Gilligan actually take control?
The rock band "The Mosquitoes" arrive on the island for some much-needed R&R. But the castaways try to make their lives miserable so they'll want to leave--and take them with them.
While The Professor tries to round up enough metal to make an anchor for a raft with an S.O.S. message attached to it, Gilligan reels in a World War II underwater mine from the lagoon.
Beautiful socialite Erika Tiffany-Smith arrives and wants to buy the island to build a resort. The Skipper falls for her and tries to impress her, but she only has eyes for The Professor.
The bachelors on the island try to cheer Mary Ann up after they hear on the radio that her boyfriend is marrying someone else. However, Mary Ann misreads their intentions and concludes that she is dying from eating poisonous mushrooms.
Gilligan finds sunflower seeds on the island that gives him the ability to read minds, and when the fellow castaways find out, they want in on the action.
When everybody mistakenly believes that The Skipper wasn't invited to the Howells' cotillion, they hold a masquerade party of their own and don't invite the Howells.
The castaways try to find a way to get a walking, talking robot that has landed on the island to provide them with their rescue. Gilligan's lucky rabbit's foot goes missing.
The Professor believes the castaways may be beginning to suffer from "Island Madness," so he convinces Ginger to use her "psychic powers" to convince them that a boat is coming to rescue them.
A crate containing a lion bound for a zoo washes up on the island. But while the other castaways are scared for their lives, the lion immediately makes a bond with Gilligan.
Gilligan discovers an underground source of hot water on the island, but The Professor soon learns that the source of the hot water is an active volcano on the other side of the island.
An impostor posing as Mr. Howell claims to having been rescued and begins selling off Mr. Howell's stocks. The real Mr. Howell offers his fellow castaways a hefty reward to get him off the island and save his fortune.
The Professor tells his fellow castaways that if they don't find a way to grow more oranges and other fruits on the island, they risk dying from vitamin deficiencies.
The Howells discover that they are not legally married. But as The Skipper prepares to marry them in the lagoon, a fight causes them to call off the wedding altogether.
A meteor crashes onto the island. The Professor soon concludes that the meteor's cosmic rays are accelerating the aging process on the island, and that the castaways will die of old age in one week.
