Episode 4

S1, E4: After most of the children suddenly turn green, panic rapidly spreads through the camp. Is it nuclear radiation? Or have the children turned into vampires? The Doctor is the only one with the antidote, but he doesn't have enough of it. When Laura turns green like the others, Tom needs to find a way to get the antidote. But the Doctor has gone power mad, and soon enough Tom & Suze find themselves in a race against time to try and work out the antidote before Tom is forced to go through with a grizzly good deed.