Source: Pop Culture Zoo
THE SECRET SERUM: There’s a vampire loose in the town, terrorizing the residents and stealing an odd assortment of loot. When the gang
does some sniffing around, they discover an unlikely suspectâ€¦ Daphne’s MOTHER. Things are already strained within
Mystery Inc., and with this latest blow, the gang is truly torn in half. Girls on one side, boys on the other.
Update: Here are the two clips.