Codename: Kids Next Door (2002)

S03E14 Operation: L.O.C.K.D.O.W.N.

When they arrive back at the Treehouse, an hurt Numbuh 1 calls for a lockdown! However, it quickly becomes apparent that the group is cornered by Count Spankulot. But is the Count truly the one they need to be wary of? Or is there another spank-happy vampire lurking among them?