The episode stars series creator Justin Roiland as both titular characters, Rick Sanchez and Morty Smith, Chris Parnell as Jerry Smith, Spencer Grammer as Summer Smith, and Sarah Chalke as Beth Smith. Ethan, a boy Summer is trying to impress with the size alteration machine, is voiced by Dan Benson in the episode. Benson reprises his role as Ethan from the third episode of the series, "Anatomy Park", as well as in the second season of the show.[6] In addition, Clancy Brown appears as the alien Risotto Groupon, an alien plotting against Rick with Jerry's help;[7] Echo Kellum voices Triple Trunks, a bartender at the resort with extra heads sprouting from his eyes and a trunk on each face;[8] Tom Kenny lends his voice as Schnoopy Bloopers and Gene, the Smith's next-door neighbor;[9] and Cassie Steele portrays Tricia Lange.[10]