Guest Stars Claudia Black voices Ma-Sha Virginia Hey voices Gazorpian Richard Christy voices Zardoz Head Richard Christy voices Teenager Morty Jr. Co Starring Tom Kenny voices Pawnshop Clerk Maurice LaMarche voices Brad Anderson Maurice LaMarche voices Adult Morty Jr. Kari Wahlgren voices Gazorpian Judge Megan Adams voices Criminal #2 Megan Adams voices Assembly Line Worker William Jennings voices Child Morty Jr. Jackie Buscarino voices Criminal #1 Finnegan Perry voices Baby Morty Jr.