Jeopardy - Series 1 - Episode 4

Children's drama series about a group of Scottish school children who travel to Australia in search of UFOs. 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?