Bernard urges the children to give up their new friends, and reveals his knowledge of their secret place. The children refuse and destroy the surveillance cameras. Bernard sends men in radiation suits but King and Simon overpower them. Simon uses one of their Geiger counters and discovers that the children are radioactive. The intruders lead the children out of the caves but they are ambushed by more men in radiation suits and most of the children are taken back to the bunker.