The doctors put the strength of human hair to the test and find out what makes different colours and types of hair.

How do you see in colour? And how can your eyes see in the dark? Time for Dr Xand to become Night Vision Man! We’ve taken over the school and even bumped the head teacher out of their office to answer your medical questions in Ouch & About. We bend your minds with a new trick in mindbenders and, in an Ouch! first, we see a camera go inside Dr Chris’ lungs! Meanwhile in the Emergency Department patient, Zona, has a super swollen knee and James has swallowed a magnet! Look out for today’s British Sign Language sign – it is ‘rainbow’.

The doctors reveal the power of mighty mucus in keeping bacteria and air particles out of your airways. And in the emergency department, Maisie has a bead stuck up her nose!

There’s flamenco dancing in the lab as the doctors take a look at fat pads in your feet. And find out what to do if someone falls from height.

George the tree frog joins the doctors to investigate how your Achilles tendon works using huge catapults! And there is a suspected spider bite in the emergency department.

The doctors investigate which part of the body heals the fastest, mouth or knee! Meanwhile, in the emergency department, Sophie has a screw in her foot!

Find out why the human body is mostly made of water as the doctors investigate the hypothalamus, the amazing part of your brain that keeps you hydrated.

The doctors reveal that your liver is an enormous energy storage system and join Lilia for an amazing operation on her brain.

The doctors supersize the alveoli, the tiny air sacs inside your lungs. And it's fingers on buzzers in Ouchology - who will get snotted?

The doctors investigate how your lungs move, with the help of a huge water slide! And today’s British Sign Language sign is ‘dinosaur’.

The doctors put the acoustic reflex to the test with an enormous balloon, and a serious case of snotting awaits the loser of today’s Ouchology.

The doctors reveal how the human brain creates maps to prevent getting lost.

The hunt is on for grossest thing ever seen on Operation Ouch!