Identical twins Dr Chris and Dr Xand van Tulleken experiment and explore their way through the fascinating world of medicine and biology. Chris and Xand will let the viewer in to their exclusive world of medicine and explain the awesome things our bodies can do. The doctors experiment on their muscles to show how they work. Dr Chris meets some wriggly maggots that are helping to heal a sore foot, and Dr Xand goes on call with an emergency ambulance team. Meanwhile, over in accident and emergency, one patient has some grit in his head after a fall in the playground and another has injured his neck after performing a karate kick.

Identical twins Dr Chris and Dr Xand van Tulleken experiment and explore their way through the fascinating world of medicine and biology. The doctors show what really happens when you sneeze! Dr Chris gets his hands on a real human brain and Dr Xand goes on call with an emergency ambulance team. Meanwhile, over in accident and emergency, one patient has a hook caught in their hand and another thinks he's lost a toenail up his nose.

The doctors demonstrate how our body movements are controlled by confusing their own brains. Dr Chris lets a blood-sucking leech feed on his arm and Dr Xand goes on call with an emergency ambulance team. Meanwhile, over in accident and emergency, a patient has locked their jaw wide open and another needs stitches after a particularly nasty fall.

The doctors see how much pain they can take in their laboratory, Dr Xand investigates how our shoes can dramatically change the way we walk and Dr Chris goes on call with an emergency ambulance team. Meanwhile, over in accident and emergency, a patient comes in with a suspected hand fracture and another may lose his fingernail after trapping his finger in a car door.

Dr Chris inserts a special medical tube into Dr Xand's nose and down to his belly to prove that the nose, mouth and stomach are all connected. Dr Xand takes things to the extreme as he endures a room colder than Antarctica to find out how our bodies cope in freezing temperatures. And Dr Chris is in the operating theatre to see an incredible robot surgeon perform a real-life surgery. Meanwhile, over in accident and emergency, one patient has a broken elbow after a game of leapfrog goes horribly wrong, and another has managed to get a stone stuck in his ear.

Dr Chris takes a terrifying, stomach-turning ride in an aerobatic display plane to explain what happens to your body when you feel travel sick. The doctors put on their pyjamas to investigate all about sleep, and Xand finally finds out if he really does snore! Also, Dr Chris goes on call with an emergency ambulance team. Meanwhile, over in accident and emergency, one patient is suffering from mysterious tummy pains and another has an injured hand after an accident involving a race in a high-heeled shoe!

Dr Chris demonstrates how vocal chords work and explores how the human body deals with fear. Dr Xand goes on call with an emergency ambulance team. In Accident and Emergency, one patient is admitted with serious stomach aches and another has a sore elbow.

The Doctors experiment with urine. Dr Chris explores the damage snake venom can do to the human body. In Accident and Emergency, one patient has a hole in his head after crashing his bike and another has a black eye.

he doctors investigate what happens when blood is full of oxygen by whisking up a blood smoothie! Dr Xand visits a special medical collection of body parts to find out some ways in which human organs can go seriously wrong, and Dr Chris goes on call with an emergency ambulance team. Meanwhile, over in accident and emergency, a new admission has a seriously battered face after a bike accident, and another has a nasty infected finger from picking at his fingernails.

Dr Chris swallows a supercool camera pill to follow the journey that food makes through his body. Dr Xand explains how strong our bones are and meets someone who has developed the technology to grow bones in a laboratory. Also, Dr Chris is put to the test as he takes part in a realistic mock surgery scenario. Meanwhile, over in accident and emergency, one patient's race to the finishing line means a trip to surgery to fix a broken elbow, and another is admitted with a sore eye and blurred vision.

Doctors take on their smelliest investigation yet when they find out how the shape, size and pong of your poo can tell you a lot about your health! Dr Xand visits the largest blood factory in the world and donates his blood to see how it is processed to help save lives. And Dr Chris spends time with the Midlands air ambulance crew; an awesome airborne emergency service which can get to the scene of an accident quickly. Meanwhile, over in accident and emergency, one patient has been admitted with a deep cut to her hand after slipping on some glass and another has to have a gash on his head glued together after crashing into a tree stump.

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The doctors investigate how skin protects the body from extreme temperatures by dipping their hands in a liquid so dangerous it can freeze on contact. Dr Chris visits an allergy clinic to find out all about allergic reactions and meets two patients who have their suspected allergies put to the test. And the emergency ambulance team comes to the aid of a lady with severe tummy pains. Meanwhile, over in accident and emergency, things get fruity as one patient is admitted with a broken 'banana' arm and another needs treatment for a burn after dropping fried onions on her foot.

The doctors reveal what lurks inside the plaque bacteria on your teeth; Dr. Chris uses a remote control car powered by his own wee; and Dr. Xand decides to get his Verucca treated!

The doctors meet Larry the vomiting robot to show the power of puke, and Dr Xand goes on an urgent mission on a motorbike to deliver blood to a hospital. Meanwhile, over in accident and emergency, one patient has fallen off his bike and another has a football injury...

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. Meanwhile, over in accident and emergency, one patient has a mystery rash and another has a bad infection under her fingernail.

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. Meanwhile, over in accident and emergency, one patient has a broken ankle and another has split her earlobe.

The doctors take a closer look inside their ears to prove how earwax has a really important job to do, and Dr Xand meets a pioneering professor who makes body parts. Meanwhile, over in accident and emergency, one patient has injured her toe and another has swallowed a hair clip...

The doctors look at the awesome work that goes on inside the liver, and Dr Chris extracts snot from members of the public for a very useful experiment. Meanwhile, over in A&E, one patient has a massive lip from an allergic reaction and another has surgery to repair his broken nose.

The doctors prove that we all have invisible ink inside our bodies, and Dr Xand sees head lice removed from someone's hair with a vacuum cleaner. Meanwhile, over in accident and emergency, one patient has banged her head on a telegraph pole and another has a piece of crayon in her ear...

The doctors use real stomach acid to do an experiment to reveal how the digestion process starts. Also, Dr Chris proves that the younger you are, the more sounds you can hear. Meanwhile, over in accident and emergency, one patient has broken his arm tripping on a kerb and another has banged his head on the handlebars of his bike.

The doctors show that your breath is just as unique as your fingerprints, and Dr Chris goes behind the scenes of medical drama Casualty to see how they make fake body parts look so realistic. Meanwhile, over in accident and emergency, one patient has a nasty infection on his cheek and another has something stuck in his ear!

Dr Chris and Dr Xand show you an awesome body trick to amaze your friends with, and reveal another way your brilliant body heals itself if you get injured. The doctors also look at some of their best bits of Operation Ouch! so far.

Dr Chris and Dr Xand turn back the clock and look at what medicine was like in the First World War. They meet a Paralympian runner who swaps her awesome blade for a World War I leather leg, and they look at the little critters that infested the trenches. Then they set up a massive experiment to demonstrate how soldiers' bodies had to cope with the pressures exerted by huge explosions.

The doctors reveal how much power there is in your farts. Also, Dr Chris trains as a nurse on a ward full of robotic patients, and in Ouch & About Dr Xand opens up the ouch-mobile - a drop-in clinic for all your medical mysteries. Meanwhile, over in accident and emergency, one patient has cut her nose and another has burnt his hand.