Just when it looked like things couldn't get any worse for the primaries, Colourless stumbles upon some batteries for his Colour Sucker 5000. Now there's almost nothing stopping him from sucking up all colours from the world - making it grey forever.
There's only a small challenge in getting the batteries out of the hands of a sleeping security guard (who thought they were juggling balls), which is a problem that can only be solved with lemons.
We also catch up with Beige, who is trying his best to be Maroon, then Green. None of the new colours are working for him - does he have to be Beige forever?
Episode 8 finishes with the primaries learning the news of Colourless' theft of the batteries - who knows how this will finish?!