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.
Marshal William T. O'Niel
Sean Connery
Mark Sheppard
Peter Boyle
Dr. Lazarus
Frances Sternhagen
Sgt. Montone
James B. Sikking
Carol O'Niel
Kika Markham
Sgt. Ballard
Clarke Peters
Sagan
Steven Berkoff
Tarlow
John Ratzenberger
Paul O'Niel
Nicholas Barnes
Lowell
Manning Redwood
Nicholas Spota
Marc Boyle
Flo Spector
Pat Starr
Officer Nelson
Hal Galili
Hughes
Angus MacInnes
Walters
Stuart Milligan
Cane
Eugene Lipinski
Officer Slater
Norman Chancer
Russel Yario
Richard Hammar
Nurse
Isabelle Lucas
Worker at Table
James Berwick
Hooker
Sharon Duce
Officer Fanning
Ron Travis
Officer Hill
Bill Bailey
Maintenance Worker
Angelique Rockas
Hitman #1
P.H. Moriarty
Worker #1
Gary Olsen
Caldwell
Chris Williams
Rayner Bourton
Anni Domingo
Julia Depyer
Nina Francoise
Brandon Hughes
Norri Morgan
Female Prostitute - Leisure Club Sequence (as Judith Alderson)
Jude Alderson
Barman (uncredited)
John Cannon