Louis Theroux

In the first episode of this two-part investigation, Louis spends time in one of the most notorious sections of Miami County Jail: the fifth and sixth floor of 'main jail', where many people facing serious charges are incarcerated.

Louis Theroux concludes his exploration into one of America's largest jails, a facility housing almost 6000 inmates. He meets an alleged murderer facing a possible death sentence and a group of younger inmates who may get a second chance.

Louis Theroux travels to Phoenix, Arizona - the capital of dementia care. And also with those looking after loved ones at home to try to understand the struggle of living in a world of encroaching shadows - and of keeping relationships alive in circumstances that can be among the strangest and most challenging imaginable.

Louis explores the nature of mental illness. He looks at how to reintegrate a patient into society when they have previously committed a serious crime.

In the second of this two-part documentary, Louis Theroux examines the grey area between criminal actions and medical symptoms, and investigates how we define insanity.