Gilligan gets bitten by a bug. From the description, the Professor surmises it is the dreaded Manis-Carni bug. If true, this means Gilligan has 24 hours to live.

He starts showing all the classic symptoms of a Manis-Carni bug bite – aches and pains in the joints, loss of appetite and an itch. The castaways begin an hourly countdown and throw a farewell party for Gilligan.

Then, one by one, everyone else gets bitten by the same bug and are forced to begin their own countdowns.

Luckily the Professor discovers an antidote just in time. Later he learns this particular variety of the Manis-Carni is not poisonous at all and the ‘symptoms’ people were showing were common-day ailments being falsely attributed to the bug bite.

America’s #1 rock ‘n roll group THE MOSQUITOS arrive on the island seeking rest and isolation from their over-enthusiastic, dedicated fans.

They announce that their plan is to stay a month on the island. The castaways don’t want to wait that long to be rescued so they start planning how they can shorten the stay of the group. They commence acting like rabid fans who pester them night and day for autographs and attention.

Part of the plan involves the women forming a support act called THE HONEYBEES. After a night time performance, everyone wakes up the next morning to discover the MOSQUITOS have departed the island.

They leave a note saying THE HONEYBEES were too professional and they don’t need the competition.

Gilligan finds a tribal headdress, leading everyone to believe they are sharing the island with head-hunters. The castaways start busily fashioning clubs and spears in defense.

A note written by the skipper is then found saying he has been taken captive on the other side of the island by the savages.

Gilligan is appointed as the replacement skipper but this new arrangement only lasts a short time before the real skipper appears.

He confesses he faked his own disappearance in order to discover if the island would be in safe hands without him. He adds he knew the headdress was not genuine as it had a ‘Made in Paris’ label inside it.

While stocking a cave with provisions for an impending typhoon, Gilligan cops an accidental whack to the head.

Whenever he opens his mouth from then on, the radio plays. When he turns his head the radio changes stations.

When the real radio gets broken, the castaways rely on Gilligan’s ‘radio mouth’ for updates on the path of the typhoon.

When the typhoon does hit the island, everyone flees into the cave stocked with provisions. They quickly realize not everyone will fit inside. Gilligan volunteers to be the person who stays outside during the typhoon clinging to a tree. One by one, each of the castaways emerges from the cave, feeling sorry for Gilligan and joining him holding on to the tree.

During a lightning strike the cave is destroyed. Everyone survives due to the decision to join Gilligan outside.

Two Russian cosmonauts accidently land on the island in their space capsule.

They tell the castaways a Russian submarine is coming for them. This makes everyone believe they have a good chance of being rescued.

The Professor thinks the Russians may have landed there on purpose and plan to use the island as a spy base. They attempt to get the Russians drunk on vodka and use their communication equipment to get a message back to the U.S but things don’t go according to plan.

The next morning the castaways awaken to find the cosmonauts gone, the rescue submarine to pick them up having arrived ‘early’ due to Gilligan setting his watch to the wrong time.

The castaways hear on the radio that Howell Industries has collapsed and its assets have been sold to cover debt.

Coming to terms with the fact he is no longer a wealthy man, Mr Howell tries to develop some survival skills on the island but soon realizes he is sadly lacking.

The others try to teach Mr and Mrs Howell basic life skills but things don’t go well. Mr Howell becomes depressed and he and ‘Lovey’ leave a suicide note before deciding to run away.

While poised on the edge of a clifftop, they hear on the radio that it was in fact POWELL INDUSTRIES, not HOWELL INDUSTRIES, that collapsed.

Gilligan discovers the wreck of a sunken ship in the lagoon. He salvages a collection of items from the wreck, including an old trunk that contains movie props and a film camera.

The castaways decide to make a silent movie about being stranded on the island, in the hope that someone will see it and rescue them. When the movie is completed, they package it in a waterproof container then float it out to sea on a raft.

A few weeks later they hear on the radio their movie has won 1st prize at the Cannes Film Festival and that the judges are waiting for the movie’s director to come forward and claim their prize (which obviously they are unable to do).

Based on the rising water level recorded by a measuring stick in the lagoon, the Professor warns the island is sinking. He estimates it will be five days before they are all completely under water.

The men decide not to panic the woman with the bad news but instead start secretly building at night more huts on higher ground on the other side of the island.

Eventually the men believe the time is right to tell the women the truth. Gilligan is elected the person to break the bad news to Ginger but she misunderstands and instead thinks they are ‘getting off the island’.

Eventually the truth comes to light. The island is not sinking. Gilligan has been using the Professor’s measuring stick to help him catch crabs in the lagoon and placing the stick in gradually deeper water each day.

Gilligan hears on the radio he has the winning ticket in the $1 million (1960’s value) Argentinian Sweepstakes.

The Howells invite Gilligan to join their Island Millionaires club. At the same time they try to develop an interest in the finer things in life in him. Gilligan confesses he finds his new life boring. Mr Howell tells Gilligan he has yet to develop the knack for being ‘idly rich’.

With the cost of entry to Mr Howell’s exclusive Millionaires Club priced at $50 000, Gilligan writes I.O.U’s for that amount to everyone else on the island. When the Howell’s find out their club is now much less ‘exclusive’, they demand to see Gilligan’s winning lottery ticket.

After a long search the ticket is eventually found. Later they hear on the radio the ticket is no longer valid as the sweepstakes have been declared bogus. Mr Howell decides to let everyone stay in the Island Millionaires club anyway.

A space satellite launched from Cape Kennedy and headed for Mars veers off course and lands on the island.

When images of palm trees and primitive huts are beamed back to the U.S, scientists believe they have found evidence for life on Mars. The castaways organize signs to indicate they need rescuing; however, they then notice the camera lens on the satellite has fallen off and is missing.

By the time they have found the lens and reattached it, due to a separate misadventure, they have all become covered in colorful duck feathers.

Resembling strange and fearsome-looking Mars creatures, the Cape Kennedy team conclude they are an alien hostile species best left alone.