The Sibunas learn that they must perform the ceremony themselves. With news of a school open day, it's the perfect opportunity to sneak out the tank....or is it? Meanwhile, Jerome's double life catches up with him.

The Sibunas make it to the Crypt with the tank and begin their ceremony, but Denby's discovered Frobisher has gone. Can Sibuna complete the ceremony before the adults find them?

The Sibunas fail to wake Frobisher and are trapped in the crypt with the adults on the warpath. Patricia hatched a rescue plan, but will she manage to rescue her friends? Jerome sweats as roommates Mara and Willow get closer...