Some of the Evolutionists (being Martyn, Netty, Timmy, Mini, and Zee) have been exposed to a weird effect in the air after four of the five were caught arguing by the 'watchers'.

 (technically just Grian. Might even put that it was Grian, and Grian just states that he is unhappy in that they are all still fighting each other).

 The others have to either learn to respect each other, or make Grian change them back by dragging him into the world.