Health documentary series giving guidance on how to keep the body's organs working at peak performance. In the dissection lab, doctor and anatomist Alice Roberts shows exactly what human organs look like up close. In this episode, she puts three rugby players through their paces to find out how their kidneys cope under stress. And she sends her own blood pressure rocketing when she comes face to face with one of her greatest fears.

Dr Alice deploys some shock tactics to make one confirmed smoker realize just how much she's damaging her lungs. Lisa Garrity's will power lets her down and on a night in the pub, she can easily binge smoke her way through 40 cigarettes. She meets up with Dr Alice in the lab to dissect a pair of lungs while outside in the real world they come face to face with a cancerous lung tumor cut out of 56-year-old Christine, a lifelong smoker. Will it be enough to convince Lisa to quit? Meanwhile, Dr Alice is testing her own lungs to the max - measuring their function while she suffers an asthma attack triggered by her own allergy to dust mites. She also wants to know if her own form of exercise, cycling, may be doing her more harm than good if she travels through a traffic clogged city. Plus she finds out which vitamin packed foods make up a tasty meal which can help keep the lungs - and all the organs in the body - working at peak performance.

Stephen Hall is putting his under plenty of stress, running a busy pub and doing all the wrong thing by binge smoking, drinking and eating. Dr Alice puts Stephen's heart and stress levels through plenty of tests and the results prove Stephen's got to make drastic changes to his lifestyle. Dr Alice also visits a pub and a chip shop - all in the name of good science of course - to analyze just what's happening to her body when she's drinking alcohol and eating greasy foods. With Dr Alice, forget boring school Biology. This is a hands on, no-nonsense guide to how we can all keep our organs working at peak performance.

Alice investigates just how good carrots really are for our eyes and whether the vast range of sunglasses on the high street give us enough protection from sun damage. Alice checks out the pros and cons of modern, laser eye surgery and gets a first-hand account of living with vision impairment.

The body's biggest organ is under scrutiny - the skin. Alice puts her own outer layer to the test, and runs her face through a computer program which ages her till she looks 80. She meets Ed, a 22-year-old farmer who is exposing his skin to the hazards of the elements and finds out just what happens when skin cancer needs surgery.

In this final episode, she looks at the most complex organ - the brain - and gets to see her own brain, in close up, via an MRI scan. Alice deprives herself of sleep for two nights to reach some surprising results. She also meets World Memory Champion, Dominic O'Brien who can remember 54 packs of playing cards in the right order having seen them only once.