Nude Celebs: Pamela Stephenson - Slapstick fun mixes with action in this third entry that finds Clark Kent (Christopher Reeve) returning to his hometown of Smallville and going up against a computer whiz (Richard Pryor) who's been hired to create a batch of synthetic Kryptonite that could spell trouble for Supes. Pamela Stephenson, Robert Vaughn, Annette O'Toole, Annie Ross, Jackie Cooper, Marc McClure, and Margot Kidder also star.