Production David Alpert Acting The Making of The Walking Dead Self 2010 Gog Dr. Peter Burden 1954 Other Credits Renfield Producer 2023 American Ultra Producer 2015 Air Producer 2015 Spare Parts Producer 2015 Hellbenders Executive Producer 2013 Saint John of Las Vegas Executive Producer 2010 Mary and Max Thanks 2009 Ultra Co-Executive Producer 2006 Agent-readable