Only Dinah can save her mother and stop the Demon Headmaster from taking over the world.

The Demon Headmaster goes to meet Dinah, but is she who he thinks she is? Meanwhile, the Lady is also on the prowl.

The Headmaster's influence is spreading, and time is running out for Kate and Splat. Michael is still worried about his father, who hasn't returned home.

The Hunters have a puzzle on their hands.

The Hunters are settling into their new house, but Harvey is uneasy – someone thinks they have seen the Demon Headmaster.

The army accidentally triggers the cloning of the Demon Headmaster.