Cocoon
Cocoon is a 1985 American science fiction comedy-drama film directed by Ron Howard and written by Tom Benedek from a story by David Saperstein. The film stars Don Ameche, Wilford Brimley, Hume Cronyn, Brian Dennehy, Jack Gilford, Steve Guttenberg, Maureen Stapleton, Jessica Tandy, Gwen Verdon, Herta Ware, Tahnee Welch, and Linda Harrison, and follows a group of elderly people rejuvenated by aliens.
Plot
About 10,000 years ago, peaceful aliens from the planet Antarea set up an outpost on Earth on Atlantis. When Atlantis sank, twenty aliens were left behind, kept alive in large rock-like cocoons at the bottom of the ocean. A group of Antareans have returned to collect them. Disguising themselves as humans, they rent a house with a swimming pool and charge the water with "life force" to give the cocooned Antareans energy to survive the trip home. They charter a boat from a local captain named Jack, who helps them retrieve the cocoons. Jack spies on Kitty, a beautiful woman from the team who chartered his boat, while she undresses in her cabin, and discovers that she is an alien. After the aliens reveal themselves to him and explain what is going on, he decides to help them.