4x13 - The Adventures of Robin Hood

A charm pedlar arrives in Nottingham. To Robin he seems harmless, but Friar Tuck discovers the man is a trickster, selling the villagers useless potions. Robin thinks of a plan to stop the pedlar's activities. Robin, at the behest of Friar Tuck, disguises himself as a fellow con-man to investigate the peddler's activities and finds himself rounded up with the charm peddler in the Sheriff's dungeon, both to be hanged.