Surgeons: At the Edge of Life

Maxillofacial surgeons Tim and Sat prepare for a marathon operation on 53-year-old Teresa, who has a cancerous tumor in her face and will die in a matter of weeks unless it is removed.

Jasmine, 74, has a vast tumor in her abdomen that is displacing her organs and shortening her life.

Surgeons and patients venture into uncharted territory with clinical trials; a new kind of liver transplant; gene therapy with a live modified virus.

Maxillofacial surgeon Tim Martin operates on a woman with a disease so rare, he's thought to be the first in the U.K. to attempt the procedure.

Surgeons help a former butcher who has dealt with years of damage to his spine.