Son of Nergal: Billy and Mandy go to Winter Camp and must contend with snowy weather, a freezing cabin and the mysterious Nergal, Jr. | Sister Grim: Grim is mistaken for Sister Big Mama and gets adopted by a convent of loving, bell-ringing nuns. | Go-Kart 3000: Grim and the kids enter the annual Endsville Go Kart Competition!