​From Wikipedia, the free encyclopedia.   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, ...