Christian Dobler, a teacher, arrives on the island after the winds took him off course. He is found by the children, who shelter him from Q, but then Christian disappears.
David finds an amphibious armored vehicle from WWII. The children repair the vehicle and disguise it as a monster, using it to frighten the QUE's henchmen.
The headmaster again is chasing up Aaron because of the amount of school he is missing. Jeremiah comes up with a plan with Tony to teach agriculture to an old widow who may be able to help them.
Jason tells David and Mark that the old hermit attacked him. When they meet up with the hermit though, he tells a slightly different story. Aaron has been missing too much school as the headmaster goes to see his mother.
The children are told that the search party was called off because they were presumed dead, by a pilot who crashes his plane on the island - and he may not make it as he is badly injured.
Tony meets a girl called Bess who appears to be able to do anything she wants, whenever she wants. What Tony doesn't realise is that Q is in charge of taking care of her and she has a plan for Tony.
Helen warns the children that the volcano will erupt soon as it does every year. They stay away, until they hear that the Prime Minister gets himself trapped on the mountain.