Codename: Kids Next Door

Operation: L.O.C.K.D.O.W.N. (3x14)

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Numbuh 5 tries to find an intruder in the KND treehouse. Numbuh 1 orders a complete lock-down of the treehouse but the enemy is already inside, and one by one the operatives are getting spanked. In the end, the KND start spanking!