Rescue from Gilligan's Island

The story picks up 15 years after the original shipwreck. Gilligan has a nightmare about the island melting. The film then notes that far away from Gilligan's Island in an unidentified country (one may assume the Soviet Union), a military unit is monitoring a satellite that is experiencing technical problems. The scientists controlling the satellite activate a self-destruct mechanism to prevent the satellite from crashing to Earth, as it contains a disc that holds some very important, top-secret information. The metal disc from the satellite is not destroyed, instead making it through the Earth's atmosphere and landing at the lagoon, eventually being found by Gilligan.