BBC Four TV Guide

A profile of the woman who revolutionised modern nursing and reformed healthcare at home and abroad. The documentary follows her life, from being born into a rich English family, and revealing how she broke through social and gender barriers to pioneer a profession previously reserved for men. Dedicating her life to helping those in need, she was a trailblazer who led a group of nurses to care for wounded soldiers during the Crimean War and developed revolutionary views about hygiene and sanitation, going on to establish a training school and reform healthcare at home and abroad

Physicist Helen Czerski explores the science of temperature. She begins by venturing to the bottom of the scale, revealing how cold has shaped the world and why frozen does not necessarily mean what people might think

Gillian Pachter turns her attention to Ruth's trial, which took just a day and a half. She starts with a tape-recorded conversation from the 1980s between Ruth's son Andre and the barrister who led the prosecution. Andre expresses doubts about his mother's trial, calling into question her state of mind and whether she was a cold-blooded killer