Mark Rosenthal is an American screenwriter and film director and long-time writing partner of Lawrence Konner. Rosenthal made his debut with the pilot Cassie & Co., followed by the motion picture The Legend of Billie Jean. This was followed by such films as The Jewel of the Nile, Superman IV: The Quest for Peace, Star Trek VI: The Undiscovered Country, The Beverly Hillbillies, and Mercury Rising. Star Trek VI co-writer Leonard Nimoy later alleged, in his book I Am Spock, that Konner and Rosenthal actually had nothing to do with the finished script, but the studio gave them credit for political reasons. Rosenthal co-wrote (with Konner) and directed The In Crowd (1988). Most recently, Konner and Rosenthal worked on the remakes for Mighty Joe Young and Planet of the Apes. Their latest films were Mona Lisa Smile and Flicka. Mark recorded a DVD commentary for Superman IV: The Quest for Peace for the Deluxe Edition of the film in 2006. Here he discusses the films original intentions and the many deleted scenes. Description above from the Wikipedia article Mark Rosenthal  licensed under CC-BY-SA, full list of contributors on Wikipedia.