George Schenck is an American screenwriter. His credits include Futureworld,the TV-movie The Phantom of Hollywood and numerous episodes of NCIS. Schenck became an executive producer during NCIS season nine. As of October 4, 2016, Schenck had written 43 episodes of NCIS. Schenck and Frank Cardea were named co-showrunners in October 2016 following the death of Gary Glasberg.Schenck became an executive producer during NCIS season nine. As of October 4, 2016, Schenck had written 43 episodes of NCIS. Schenck and Frank Cardea were named co-showrunners in October 2016 following the death of Gary Glasberg.