Synthetic kryptonite laced with tobacco tar splits Superman in two: good Clark Kent and bad Man of Steel.
Director: Richard Lester
Cast: 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