Operation Ouch!

The doctors discover the speed of nerves and make a cake look bigger. Dr. Xand sees what happens when you don't wash your hands.

The doctors show where your blood comes from and Dr. Chris meets a patient going for brain surgery. They test a concentration trick.

The doctors get the help of an opera singer to reveal the hidden muscle that makes you breathe. Dr. Xand uses DNA to hunt a milk thief.

The doctors show what happens when you get diarrhoea. Dr. Xand gets his skates on and learns how to spin without getting dizzy.

Dr. Chris and Dr. Xand try to find out why skin goes wrinkly in the bath. Dr. Chris meets a patient taking part in amazing heart research.

The doctors check out the cleaning power of our kidneys and the Ouch-Mobile is open for medical mysteries.

The doctors use a Xand doll to show what happens when you eat. Dr Chris goes to work fighting infectious diseases.

The Doctors reveal the amazing organs that keep you alive before you’re born. Dr Xand meets patients being treated at a burns clinic.

In the last episode, the doctors look back at their favourite bits of the season - including the cough experiment and hearing operation.

Dr. Chris and Dr. Xand show what happens to your body when you reach puberty, and why. They talk spots, sweat, and staying late in bed.

Dr Chris and Dr. Xand go back in time to see what medicine was like in the First World War.