Scared Straight - S2.E7

Every Halloween, Pops puts out a cup of coffee and a doughnut to please the spirit of a dead woman, Cassandra Malloy, which he believes resides in the building. As a joke, Shawn and Marlon sneak in and eat the offerings. Soon, strange things begin to occur at the building and the guys admit their prank to Pops. To resolve the problem, Monique agrees to perform an exorcism.