Hi-Fi Gilligan

Hi-Fi Gilligan is the tenth episode of the Second season. It aired November 25, 1965.

Synopsis
The Professor is tracking a typhoon about to hit the island through the radio, and the Skipper and Gilligan are stocking supplies to ride it out from a cave. The Skipper, however, accidentally strikes Gilligan in the jaw with a crate, pressing one of the fillings in his mouth to act as a receiver. This is an ideal solution for the Castaways as the Professor is using the radio. Ginger and Mary Ann use Gilligan to listen to their exercise program, but at night, the Skipper can't sleep with the noise. Gilligan wanders The Island disturbing everyone else trying to sleep. He eventually crosses over where the Professor is trying to track the storm, stumbling and fixing in teeth but breaking the radio. Unable to track the storm, the Professor is desperate to fix the radio. Gilligan, meanwhile, offers to have the Skipper re-smack his tooth into a receiver to help the Professor, eventually smacking himself in the head and resetting the tooth. With Gilligan's tooth a receiver again, the Professor realizes the storm is coming right at them and everyone takes refuge at the cave which with the supplies isn't big enough to hold all of them. Gilligan secretly shortens his straw to spare the others, but eventually, everyone comes to stick it out with him. With everyone out of the cave, a lightening bolt strikes it, caving it in as Gilligan effectively saves their lives.

Trivia

 * Archived storm footage from the opening theme is used as the typhoon in the episode.
 * With all the caves seen on the island, it's unrevealed why the Professor and Skipper chose a narrow one that obviously couldn't hold all the castaways.
 * The syndicated version of the episode cuts the last scene where the Professor reveals the typhoon was broken up by an electrical storm, something that doesn't actually happen.