Little House on the Prairie S06E14 - The Werewolf of Walnut Grove

Walnut Grove has a school bully, Bart. Albert and Laura want to teach the bully a lesson. Albert dresses up as a werewolf, but the bully doesn't buy it when Carrie comes out and tells Albert and Laura that she'll tell Ma that all of the glue was used by them. Laura and Albert come up with another plan. But in the end, it takes the joint efforts of the school children to get the bully to be nice.