Arthur and the Haunted Tree House

S1 E1: While trick-or-treating, Francine meets an old woman with a very mysterious past, while Binky finds himself at Mr. Ratburn’s amazing haunted house. Muffy and Bailey decide to cut through a dark, rainy cemetery. And as for Arthur, Buster, and Ladonna? Their tree house sleepover seems to be haunted, but by what?