At Wales’s biggest hospital, neurosurgeon George Eralil operates on a 19-year-old with a rare brain tumour, and vascular consultant Lewis Meecham faces a wave of emergency cases.

Paediatric surgeon Oliver Jackson fights to ensure surgery for a 17-week-old baby triplet goes ahead. And a man who was the victim of an attack has an operation to restore his sight.

Two maxillofacial surgeons team up to rebuilds a 19-year-old’s face after removing a tumour, and consultant Aarti Sharma fights to give a mother with incurable cancer more time with her four children.

Eye surgeon Magdalena Popiela fights to save a woman’s sight, and for orthopaedic surgeon Clare Carpenter, a wave of emergencies add pressure to an already full day of surgery.

Paediatric surgeon Selena Curkovic is determined to make a life-changing operation happen for an eight-year-old boy, and a spinal surgeon must decide which of two patients gets surgery first.

A breast cancer patient and her surgeon of nine years hope a third operation means she can live life fully again, and three surgeons remove a tumour that is a 'ticking time-bomb.'

Stuart Quine is under pressure during complex, pioneering robotic surgery, and Indu Deglurkar treats a martial arts competitor shocked to learn he needs open-heart surgery.

A nine-year-old boy faces a complex operation after his condition worsens while on the waiting list. Neurosurgeon Kat Whitehouse tackles a large brain tumour in a retired miner.

An operation to cure a woman’s extreme facial spasm has challenging results for surgeon George. A six-week-old baby needs an urgent operation to allow him to feed again.

Cancelled operations mean surgeon Lewis must change his plans fast or risk losing precious theatre time. A father of two undergoes complex neurosurgery to save his eyesight.

A man enduring excruciating facial pain undergoes surgery to transform his life. Surgeon Tom battles to remove a large, rare tumour that’s pressing on a patient’s heart.

A child whose hearing has significantly reduced has a life-changing operation to insert cochlear implants. Surgeon Dheeraj uses the ‘beating heart’ technique to save a father.