Scooby-Doo! Mystery Incorporated (2010)

S1E11 The Secret Serum

Title: The Hidden Elixir Plot: A vampire is wreaking havoc in Crystal Cove, scaring the townsfolk and making off with bizarre treasures. As the gang investigates, they stumble upon an unexpected culprit—Daphne's MOTHER. With tensions already high within Mystery Inc., this revelation causes a rift among the team, splitting them into two factions: the girls versus the boys. As they grapple with this shocking betrayal, the group's unity hangs in the balance, and they must decide whether to confront the truth or let their differences drive them apart.