Aiming to defeat the Man of Steel, wealthy executive Ross Webster hires bumbling but brilliant Gus Gorman to develop synthetic kryptonite, which yields some unexpected psychological effects in the third installment of the 1980s Superman franchise. Between rekindling romance with his high school sweetheart and saving himself, Superman must contend with a powerful supercomputer.
Christopher Reeve
Richard Pryor
Jackie Cooper
Marc McClure
Annette O'Toole
Annie Ross
Pamela Stephenson
Robert Vaughn
Margot Kidder
Gavan O'Herlihy
Nancy Roberts
Graham Stark
Henry Woolf
Gordon Rollings
Peter Wear
Justin Case
Bob Todd
Terry Camilleri
Stefan Kalipha
Helen Horton
Lou Hirsch
Bill Reimbold
Shane Rimmer
Al Matthews
Barry Dennen
Enid Saunders
Kevin Harrison Cork
Robert Henderson
Paul Kaethler
R.J. Bell
Pamela Mandell
Peter Whitman
Ronnie Brody
Sandra Dickinson
Philip Gilbert
Pat Starr
Gordon Signer
John Bluthal
George Chisholm
David Fielder
Robert Beatty
Christopher Malcolm
Larry Lamb
Geoffrey Steele
Jill Goldston
Barrie Holland