Classic public domain film, digitally preserved and free to stream forever.
Rescue from Gilligan's Island (1978) is the TV movie sequel to the classic sitcom, in which the castaways are finally rescued from the island after a tidal wave washes their hut out to sea — only to discover that readjusting to civilization after years marooned is its own comedy of errors.
Starring Bob Denver, Alan Hale Jr., and Jim Backus. This film is in the public domain and free to watch, download, and share.