The doctors reveal how far a heart can pump blood, Dr Xand meets a life-saving dog, and Dr Chris is in the ouch-mobile solving more medical mysteries. Show more

The doctors reveal how you taste with your nose as well as your tongue, and Dr Chris discovers how 3D printing works when he prints his own skull. Show more

The doctors fill their bladders, quite literally, to show what happens when you go for a wee. Meanwhile, in accident and emergency, one patient has swallowed a coin. Show more

The doctors make an unusual type of cheese with Xand's body bacteria and find out what to do if someone breaks their leg. Show more

The doctors get competitive in a race to reveal what happens when blood vessels get blocked and Dr Xand goes for some physiotherapy. Show more

Dr Chris trains as a nurse on a ward full of robotic patients, and Dr Xand opens up the ouch-mobile - a drop-in clinic for all medical mysteries. Show more

The doctors reveal what comes out of your mouth when you cough, and Dr Xand gets a front-row seat at a life-changing operation. Show more

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. Show more

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. Show more

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. Show more