With Mr Simmons and Melissa missing, the girls become even more scared when Chrissie starts seeing things. While Leon and the trekking party return with more strange news, Simon plots to split the group.

Chrissie becomes increasingly worried by Simon's strange behaviour, and decides upon a desperate solution. Harry reveals his disturbing secret to Lucy, and they rejoin the remaining four to discover that dingoes have wrecked the camp. Meanwhile, David has a remarkable encounter which confirms his belief in aliens.