Why Do We Wee?

27m

The Doctors fill their bladders, quite literally, to show what happens when you go for a wee. Meanwhile, in Accident & Emergency, one patient has swallowed a coin.

Whose Lying Here?

27m

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.

Bionic Eyes and Body Cheese

27m

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

Don't Try This At Home!

27m

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.

A Body Full Of Blood

26m

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

The Bits That Make You Scream "Ouch!"

28m

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.

How Your Nerves Work

27m

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.

Can I Borrow Some Of Your Blood?

27m

The doctors 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.

Who Stole The Milk?

27m

With the help of opera singer Lucy O'Bryne, the doctors reveal the hidden muscle that makes you breathe. Then, Dr Xand heads to a DNA laboratory to solve a mystery.

What's In Your Diarrhoea?

27m

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.