Making milkshake with heavy metal music and how does the heart work?

Meet The Blowfish - the world's only heavy metal marine biologist! He's on the phone from New Zealand to tell us about The Rock Music Milkshake Mixer - a prototype for a unique, new milkshake blender... that's powered by an electric guitar! The Blowfish explains how the mixer uses sound energy from crunching guitar riffs to whip milk up into a delicious drink! 

Plus, we travel back in time with Sir Sidney McSprocket to discover how sticky tape was invented, explore evidence that Julius Caesar actually invaded Britain, and learn about blood, valves, pulses... and everything else that helps your heart work!