On the sunless moon Io, Marshall William T. O’Niel goes toe-to-toe with the corrupt manager of a mining colony and his gang of roughnecks while investigating a rash of worker suicides.

• The Ladd Company
• Outland Productions
• Sean Connery
• Peter Boyle
• Frances Sternhagen
• James B. Sikking
• Kika Markham
• Clarke Peters
• Steven Berkoff
• John Ratzenberger