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Dr Chris, Dr Xand and Dr Ronx explore the ins and outs of the human body in a variety of exciting experiments.
The doctors find themselves in a crazy race as they explore the bones in your feet.
Dr Xand invents a facial-recognition system to keep his twin out of the lab.
There's a lizard in the lab sharing an amazing piece of body kit with you.
Loud, LOUD, LOUDER! Dr Xand has created a thunder tube to show you how your vocal tract makes your voice loud.
What Are Vaccinations For? Find out why Dr Chris is giving Dr Xand a vaccination in the lab.
Slime, Snot and Bogies. Dr Xand races Dougie the dog to show you how your shoulders work.
Flexible Arms and Triple Jumping. Dr Chris challenges Dr Xand to beat Dougie the dog in a race.
Find out why and what you need your kneecaps for in today's lab.
Dr Xand performs an experiment to show how your brain tells your muscles to move!
Dr Chris sets Dr Xand the impossible task of being Mini-Xand’s pituitary gland.
It's a Tug-O-War! A tug of war in today’s lab shows the incredible strength of your ligaments.
Virus Alert! Dr Chris puts Dr Xand inside a giant water balloon to show how viruses attack our bodies.
What Happened Next? The doctors revisit Ouchers from across the last seven series to find out how they are.
Food, Poo and You! The doctors investigate food and poo to show you why it is important to know what you eat.