Sherlock wonders why everyone in Chicken Avalanche has suddenly started squeaking and thinks he knows the answer.

Sherlock and Botson find themselves at Chicken Avalanche and then everyone starts making a strange sound.

Sherlock and Botson follow the mysterious tunnel they find themselves trapped in.

Sherlock and Botson get stuck in a cupboard and then make a surprising discovery.

Sherlock investigates the school aquarium and meets some curiously named fish.

Sherlock and Botson inspect Mr McBoglan's classroom.

Sherlock works out what FHS stands for and Botson does some beatboxing.

Sherlock confronts Floriarty about the mystery box, with mixed results.

Sherlock and Botson try to work out what FHS, which was etched on the mystery box, could possibly mean. And Botson sings a song about fruit.

Sherlock and Botson finally open the mystery box and get a shock when they look inside.