Episode 10. Dr Chris and Dr Xand demonstrate what to do if someone chokes, and the ouch-mobile opens its doors to help solve more medical mysteries. [S]
Episode 8. The doctors set fire to food, Dr Xand goes to an asthma clinic and the ouch-mobile opens its doors to solve more intriguing medical mysteries. [S]
Episode 6. The doctors try to trick their body temperatures, and Dr Xand tries to stop his body giving him away when he tells fibs in a lie detector test. [S]
Don't Panic About Puberty (Special). In this special episode, Dr Chris and Dr Xand take a look at what happens to your body, and why, when you reach puberty. [S]
Best Of... The doctors choose some of their favourite moments, including an experiment to find out what happens when you cough and a life-changing operation. [S]
Episode 8. The doctors reveal the amazing organs that keep you alive before you're born, and Dr Xand meets patients undergoing treatment at a burns clinic. [S]
Episode 7. Dr Chris and Dr Xand find out what happens when you eat with the help of a miniature Xand doll, and Dr Chris is at work fighting infectious diseases. [S]
Episode 6. The doctors look at kidneys and reveal how these amazing cleaning machines work. Also the ouch-mobile is open for more medical mysteries. [S]
Episode 5. The doctors test a new theory to see if they can find out why skin goes wrinkly in the bath, and Dr Chris meets a patient taking part in groundbreaking heart research. [S]
Episode 4. The doctors reveal what happens when you get diarrhoea, Dr Xand meets Alexia and Kloe from CBBC's Ice Stars, and there's a hidden camera experiment. [S]
Episode 3. With the help of opera singer Lucy O'Byrne, the doctors reveal the hidden muscle that makes you breathe. Then, Dr Xand heads to a DNA laboratory to solve a mystery. [S]
Episode 2. Dr Chris and Dr Xand reveal where your blood comes from, Dr Chris meets a patient undergoing life-changing brain surgery and there is a trick to test the powers of concentration. [S]
Episode 1. Dr Chris and Dr Xand reveal the surprising secret behind the speed of your nerves, and Dr Xand finds out what happens if you don't wash your hands. [S]
Episode 4. Dr Chris uses a tiny camera to reveal what happens in his throat when he swallows food, and Dr Xand enters a special chamber that removes sensory data from his brain. [S]
Episode 3. The doctors take a close-up look at how the eye works, and Dr Chris finds out what body fat does by looking at some of his own under a microscope. [S]
Episode 1. The doctors reveal what lurks inside the plaque on your teeth, Dr Chris uses a remote-controlled car powered by his own wee, and Dr Xand decides to get his verruca treated. [S]
Episode 11. Series about the world of medicine and biology. The doctors take on their smelliest investigation yet and Dr Xand visits the largest blood factory in the world. [S]
Episode 10. Series about the world of medicine and biology. Dr Chris swallows a supercool camera pill to follow the journey that food makes through his body. [S]
Episode 9. Series about the world of medicine and biology. The doctors investigate what happens when blood is full of oxygen by whisking up a blood smoothie. [S]
Episode 6. Series about the world of medicine and biology. Dr Chris explains what happens to your body when you feel travel sick, and Xand finally finds out if he really does snore. [S]
Episode 5. Series about the world of medicine and biology. Dr Chris inserts a tube to Dr Xand's nose and down into his belly to prove that the nose, mouth and stomach are all connected. [S]
Episode 4. Dr Chris and Dr Xand experiment and explore their way through the fascinating world of medicine and biology. The doctors see how much pain they can take in their laboratory. [S]
Episode 3. Dr Chris and Dr Xand experiment and explore their way through the fascinating world of medicine and biology. The doctors demonstrate how our body movements are controlled. [S]
Episode 2. Dr Chris and Dr Xand experiment and explore their way through the fascinating world of medicine and biology. The doctors show what really happens when you sneeze. [S]
What Happened Next? Join the doctors for a special episode as they revisit with Ouchers from across the last seven series to find out how they are doing now. [S]
Extraordinary Ears. Dr Chris and Dr Xand show how incredible the human body is. The doctors reveal the amazing piece of body kit that helps your ears to pop. [S]
Food, Poo and You! In this special episode, the doctors investigate food and poo to show you why it is important to know what you are eating and look after your body! [S]
What Happened Next? Join the doctors for a special episode as they revisit with Ouchers from across the last seven series to find out how they are doing now. [S]
Virus Alert! Dr Chris puts Dr Xand inside a giant water balloon to show how viruses attack our bodies, and Dr Chris discovers how the shape of your ears enables you to hear. [S]
All Hail King Xand. Dr Xand takes to the throne when Dr Chris sets him the impossible task of being Mini-Xand's pituitary gland, and Dr Ronx meets dental patients to find out more about braces. [S]
All Hail King Xand. Dr Xand takes to the throne when Dr Chris sets him the impossible task of being Mini-Xand's pituitary gland, and Dr Ronx meets dental patients to find out more about braces. [S]
Episode 4. Dr Chris uses a tiny camera to reveal what happens in his throat when he swallows food, and Dr Xand enters a special chamber that removes sensory data from his brain. [S]
Flexible Arms and Triple Jumping. Dr Chris challenges Dr Xand to beat Dougie the dog in a race, the doctors catch up with our Ouch Babies and there is a face-twisting trick in Mindbenders. [S]
Episode 10. Dr Chris and Dr Xand demonstrate what to do if someone chokes, and the ouch-mobile opens its doors to help solve more medical mysteries. [S]
Slime, Snot and Bogies. Dr Xand races Dougie the dog to show you how your shoulders work, the doctors catch up with the Ouch Babies, and there is a face-twisting trick in today's Mindbenders. [S]
What Are Vaccinations For? Find out why Dr Chris is giving Dr Xand a vaccination in the lab, meet our Ouch babies as they are born, and get some mindfulness tips in Mindboosters. [S]
Episode 1. The doctors reveal what lurks inside the plaque on your teeth, Dr Chris uses a remote-controlled car powered by his own wee, and Dr Xand decides to get his verruca treated. [S]