Schemers and Screamers (S04E18)

Someone is trying to sabotage the Squad, and it seems they´re acting from the inside. Magalie tries to figure out who´s guilty, in addition to finding a way to free the mummies that one of the Squad members had imprisoned. Meanwhile, Charles has to hand in his famous serum to the Monster Council… that is, until he finds out their real agenda. And Léo wants to align himself with a long-standing enemy. (TFO)