Guest Stars Walton Goggins voices Cecil Stedman Zazie Beetz voices Amber Bennett Jason Mantzoukas voices Rex Sloan / Rex Splode Andrew Rannells voices William Clockwell Grey DeLisle Griffin voices Amanda / Monster Girl Melise voices Kate Cha / Dupli-Kate Ross Marquand voices Rudolph "Rudy" Conners Dan Navarro voices Additional Voices Robert Kesselman voices Additional Voices Ami Shukla voices Additional Voices Nyima Funk voices Additional Voices Seth Rogen voices Allen the Alien Ben Schwartz voices Shapesmith Rob Delaney voices Nuolzot/Séance Dog Grey DeLisle Griffin voices Thula Peter Cullen voices Thaedus Tatiana Maslany voices Telia Lea Thompson voices Carol Daveed Diggs voices Theo Daveed Diggs voices Council Member #2 Fred Tatasciore voices Data Twin #2 Fred Tatasciore voices Ticker Seller Fred Tatasciore voices Marvin Melise voices Lucinda Grey DeLisle Griffin voices Woman Paul F. Tompkins voices Narrator Jay Pharoah voices Council Member #1 Jay Pharoah voices Cute Guy Jay Pharoah voices Data Twin #1