The doctors reveal what makes you flexible as they test the incredible strength of a tendon to the max, and they find out what it's like to be an air ambulance pilot in Operation Takeover. Dr Xand uncovers if laughter really is the best medicine, and we meet the first of our Ouch Patients to find out what it's like to be a regular hospital patient. Meanwhile, in accident and emergency, one patient has surgery to fix a leaking bone graft, while another is treated for a dancing injury.

The doctors reveal how your eardrum works to enable you to hear, and they find out how tough it is to be hospital radio hosts in Operation Takeover. Dr Chris discovers what it takes for anaesthetists to keep you safe and pain-free during operations, and Ouch & About On Call hit the wards to answer patients' medical questions. Meanwhile, in accident and emergency, one patient comes in with a cut to his hand and another is treated for a football injury.

The doctors reveal how important cartilage is to your body with the help of a suit of armour, and they find out what it takes to be a hospital porter in Operation Takeover. Dr Chris meets Nala the dog to see how she helps patients in hospital, and we meet two more of our ouch patients to find out what it's like to be a regular hospital patient. Meanwhile, in accident and emergency, one patient arrives by air ambulance and another is treated for a spring stuck in his thumb.

The doctors reveal why your body can't survive without oxygen for more than three minutes, and they find out what it's like to be 999 call handlers in Operation Takeover. Dr Xand investigates how Formula One race car technology can help hospitals, and Dr Chris hits the wards in Ouch and About On Call. Meanwhile in Accident and Emergency, one patient comes in after a bike accident and another has fallen on her wrist.

The doctors reveal how amazing your saliva is, and they find out why the hospital's maintenance team work with birds of prey in Operation Takeover. Dr Chris heads to the Emergency Department to find how the doctors know who to treat first, and we catch up with Ouch patients Ruby and Tola. Meanwhile in accident and emergency one patient arrives by air ambulance after a rugby match and another has a cut on her foot after it was caught in a bike wheel.

The doctors reveal the special cells in your eyes which help you to see out of the corner of your eye, and they find out what it takes to be a hospital entertainer in Operation Takeover. Dr Chris heads to a laboratory where scientists are making blood from stem cells, and more medical mysteries are answered in Ouch and About On Call. Meanwhile in Accident and Emergency, one patient is brought in by air ambulance after cutting her chest and another has hit his head on a goalpost.

The doctors reveal the amazing army of germ-fighters that make up your immune system, and they find out just how difficult it is to clean a baby's incubator in Operation Takeover. Dr Xand meets Alex who has Autism, and we catch up with Ouch Patients Holly and Haiden in. Meanwhile, in Accident and Emergency, one patient has cut her nose and another has injured his toe.

The doctors find out why we burp and even manage a world-first when they film Dr Xand burping from the inside. They also get behind the wheel to discover what it takes to be a good ambulance driver in Operation Takeover. Dr Xand joins the radiology department to find out how they see inside our bodies and Dr Chris is answering medical questions on the wards in Ouch and About On Call. Meanwhile in Accident and Emergency, one patient has cut her hand doing arts and crafts, and we meet a familiar face with a dislocated jaw.

The doctors reveal the amazing job your pancreas does to keep your blood sugar levels in check, and they find out what it's like to be the hospital postman in Operation Takeover. Dr Xand investigates how scientists make bioglass to help doctors mend damaged bones, and we catch up with all four of our Ouch patients for one last time. Meanwhile, in accident and emergency, one patient arrives by air ambulance after falling on a spiky fence and another has come off her bike, cutting her chin.

In the last episode of the series, the doctors reveal the amazing strength of your jaw, and they see if they can take the heat when they try their hands at being hospital ward chefs in Operation Takeover. Dr Xand joins the ear, nose and throat department to see how they fix their patients, and Dr Chris hits the wards answering questions for one last time in Ouch and About On Call. Meanwhile, in accident and emergency, one patient is treated for an injury to her neck, and another has cut his foot on a tin lid.