A game show contestant comes to the island and can win $10,000 if he can survive one week without outside assistance, so he refuses to let the castaways use his transmitter because he would have to forfeit the prize.
The Professor recreates the Minnow voyage to disprove a Maritime Board charge that The Skipper was responsible for the wreck of the Minnow, but their efforts prove that the person to blame for the wreck is actually Gilligan.
A big-game hunter arrives on the island. Upon learning there is nothing on the island to hunt, he chooses instead to hunt one of the castaways--and he chooses Gilligan.
Mr. Howell becomes outraged and jealous when he discovers that a secret admirer is sending letters to Mrs. Howell. But everyone is even more shocked when they discover that he's the one who's sending them.
Gilligan's body conducts electricity after he is struck by lightning with a bowling ball in his hand. But when The Professor tries to remove the bowling ball from Gilligan's hand, a second lightning strike makes him invisible.
The castaways try to contact two astronauts in a space capsule orbiting over the island, but they fail. However, they may get a second chance when an unmanned capsule they are trying to make contact with lands on the island.
The castaways find a headhunter tribe's totem pole on the island. The head on the top of it bears an uncanny resemblance to Gilligan--which comes in handy when the headhunters return to the island.
After Mary Ann watches Ginger perform on the island she hits her head giving her amnesia thus believing that she is Ginger Grant. Everyone plays along, until Mary Ann can't act or dance and her memory comes back.
Gilligan saves a native island woman named Kalani from drowning which, according island custom, makes her his slave. But a fellow tribesman soon comes to the island and challenges Gilligan for Kalani in mortal combat.
The castaways attach a message to a homing pigeon that has flown off course and landed on the island, but the man who receives their message thinks it's part of a practical joke.
A lost crate containing a top-secret clay that can be converted to explosives washes up on the island. Not knowing what it is, they make several items with it--including Gilligan's new tooth fillings.
A king from a nearby island comes to the island in search of a "White Goddess" to sacrifice to a volcano, but the castaways offer Gilligan to him instead to protect the women.
