An honest marshal in a corrupt mining colony on Io, Jupiter's sunless third moon, is determined to confront a violent drug ring even though it may cost him his life. After his wife angrily deserts him, he waits alone for the arrival of killers hired by the company to eliminate him.
Sean Connery
as Marshal William T. O'Niel
Peter Boyle
as Mark Sheppard
Frances Sternhagen
as Dr. Lazarus
James B. Sikking
as Sgt. Montone
Kika Markham
as Carol O'Niel
Clarke Peters
as Sgt. Ballard
Steven Berkoff
as Sagan
John Ratzenberger
as Tarlow
Nicholas Barnes
as Paul O'Niel
Manning Redwood
as Lowell
Marc Boyle
as Nicholas Spota
Pat Starr
as Flo Spector
