20) The Beating Heart

Join our plucky "heroes" as they dash, dodge, and plummet through the Learning Chambers towards the centre, and home! But life is never as easy as you hope it's going to be, and disappointment mixes with confusion when Natalia, Nerium, Taro, and Findex discover what, or who, has been waiting in the Heart of the Learning Chambers...

See also: 10 made-up names, round-house clocked, this is very goth, a raw 20, Nero, good news and bad news, how not to talk to kids, and just the bits.