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 thi…

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 an…

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 emer…

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 emergenc…

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 o…

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 h…

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 ha…

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 goe…

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 …

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…

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 …