Rescue from Gilligan's Island (1978)

Cast

Bob Denver, Alan Hale Jr., Jim Backus, Natalie Schafer, Judith Baldwin

Overview

When a decaying Russian satellite crashes on the island, the Professor uses a key component for a barometer. With that device, he learns that a massive wave is going to swamp the island. In desperation, the castaways lash their huts together into one structure in order to have any chance to ride the disaster out.