S1, E4: Moo Gak asks the troupe leader to take Cho Rim back, he orders him to make him laugh; they find body with an engraved barcode at the park, breaking the chain-murder pattern and creates chaos within the special investigation team.

S1, E4: Moo Gak asks the troupe leader to take Cho Rim back, he orders him to make him laugh; they find body with an engraved barcode at the park, breaking the chain-murder pattern and creates chaos within the special investigation team.