Doctor HOW demonstrates how to make explosive crisps, Vick and Sam stop two tractors with nothing more than paper, and the team have a decorating challenge disaster. 

Sam shows the team how to tuck into a tasty worm treat, Frankie explains how a mistake rewrote a famous fairy tale, and Vick shows Frankie how balloons go bang with cotton wool. 

Vick, Sam and Frankie are feeling competitive as they find out how to race bugs, Sam gets gross when he asks how gruesome your face is, and food gets dangerous with Doctor HOW.

The team discover how to keep a big bag of crisps fresh with wet wipes and how to un-crush a can of drink, and Fred invites a pizza expert to make a pizza in record time.

Frankie and Vick discover how to pinch a piece of pizza, Doctor HOW shows Sam how to see a song, and Fred's gone potty as he asks how you throw a pot...