Marshal O'Niel's assigned to a mining colony on Io, one of Jupiter's moons. He soon encounters miners who are dying, due to use of an illegal amphetamine. O'Niel follows the trail, and now O'Niel must watch his back, as he's now their target.

**Director**: Peter Hyams
**Writer**: Peter Hyams
**Cast**: Sean Connery, Frances Sternhagen, Peter Boyle

 [More details on IMDb](https://www.imdb.com/title/tt0082869/)