One night, three aliens from the planet Taros — a young woman named Robyn, a girl named Tavy, and a furry three-eyed, three-armed creature named Kirbi — stow away on a spaceship headed for Earth, and land near Aladdin, Wyoming. The next morning, the aliens befriend a rancher's son named Dirt while he's out riding fences on his motorcycle. Robyn shows off her bike-riding skills, and the quartet go to visit Dirt's grandparents. After Kirbi beats Grandpa at poker, the creature drinks a can of gasoline. Later, Kirbi keeps feeding the goats even though Grandpa wants him to feed the chickens. Grandpa then shows Kirbi how to shoot Coors cans with a gun while he complains about how much the world has changed. Dirt forms a relationship with Robyn, learning that her hair changes color depending on exposure to sunlight and that she's come from a moonbase and was supposed to go back to her home planet, rather than coming to Earth. Dirt tries to keep his new friends a secret from the rest of his family, but things get complicated when other aliens come looking for the missing trio, Grandpa shows Kirbi to some old folks at the General Store, and a Senator arrives at the ranch for a barbecue. 
- Sydney Penny as Robyn
- Ricky Paull Goldin as Dirt
- Dennis Holahan as Aric
- Keenan Wynn as Grandpa
- Rosie Marcel as Tavy
- Hersha Parady as Mrs. McAlpin
- Peter Jason as Mr. McAlpin
- Patricia Brookson as Cee Gee
- Talia Shire as Dr. Tedra Rosen
- Marilyn Schreffler as the voice of Kirbi
The character of Kirbi got his "I" changed to a "Y" and became a supporting character in the 2005 animated film Chicken Little.
This is the final movie in which actor Keenan Wynn appears.
Though the movie takes place in rural Wyoming, it was filmed in Calgary, Alberta.
Hyper Sapien: People from Another Star was produced in Canada by TaliaFilm II Productions, distributed by TriStar Pictures and released on December 3, 1986 in North America. When Hyper Sapien: People from Another Star was nearing completion, TriStar Pictures purchased the distribution rights in the United States while Warner Bros. obtained the foreign distribution rights.