The group's pleasure at Arnie's arrival is shortlived when Joe and Arnie are revealed as partners. Melissa and Simon spring a surprise, and the villains make a getaway. Sarah manages to contact the police, and the race is on for the group to reach their rendezvous with the police and rescue service.

The group and Gerry reunite, only to be captured by the man apparently behind their strange encounters. David remains convinced that UFOs are in the area.

Sarah finds Melissa's camera, confirming that she was abducted. Chrissie discovers a tyre track and maybe a new route out of the camp. Simon's delirium worsens. Chrissie and Simon discover a shack.

While the others make a desperate last search for Simon and Chrissie, Shona makes a chilling discovery at the camp. After a rescue attempt is thwarted, the team are forced to abandon the camp before Simon and Chrissie return.

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.

Simon and Chrissie have ditched David and disappeared in the canoe. Simon has a very odd meeting.

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.

David and Simon set off to rescue Mr Simmons, and at base Chrissie is beginning to behave very weirdly. Harry decides to carry Leon to the four-wheel-drive alone and makes a strange discovery.

Leon's condition worsens and Chrissie reveals that it was her fault that the anti-venom was left behind. Gerry decides to head off with the sick Stanley and the other boys, leaving the girls at base camp. However, they become lost due to poor map reading, and soon another member of the group disappears into thin air.

After discovering deep holes in the shape of a pentagram, David and Harry see a red light shooting across the horizon. The group are frightened when Leon, feverish after being bitten by a snake, makes a prophecy. And as Melissa heads back towards the camp, who or what is following her?

A crisis looms when Leon is bitten by a snake, and he reacts badly to the venom. Can the series of strange encounters in the inhospitable Paramundi region be the evidence of alien activity the group has been seeking?

Sarah's spooky experience has divided the party, and the group demand evidence. Can the group unite aginst the problems that face them in the harsh Australian bush? Will they be able to collect the evidence they need to succeed?

The exciting journey is just the beginning of their adventures as the young explorers record their experiences on camera.