Louis Theroux joins the Philadelphia Police Department as they patrol the most dangerous parts of one of the most violent cities in America. Show more

Louis has gained access to Coalinga Mental Hospital in California, which houses more than 500 convicted paedophiles who have been deemed unsafe for release. Show more

Documentary in which Louis Theroux visits Fresno in California's Central Valley to see how crystal meth addiction affects the local community, speaking to police and addicts. Show more

Louis visits one of America's leading children's psychiatric treatment centres in an effort to understand why some parents put their children on drugs to control their behaviour. Show more

Documentary. Louis Theroux is in Lagos, spending time with the local gangs, the so-called Area Boys, and the government's Kick Against Indiscipline paramilitary task force. Show more

Travelling to America's heartlands, Louis Theroux spends time with people who have private collections of tigers and chimpanzees. Show more

Following up on his 2007 documentary, The Most Hated Family in America, Louis Theroux returns to Topeka, Kansas, for a week-long visit with the Westboro Baptist Church. Show more

Louis Theroux spends time with ultra-nationalist Jewish settlers, who consider it their religious and political obligation to populate some of the sensitive areas of the West Bank. Show more

Fifteen years after documenting the world of male porn performers in Los Angeles, Louis Theroux returns to find a business struggling with the deluge of free porn online. Show more

First broadcast in 2012, Louis visits a school for autistic children in Warren, New Jersey. He meets the students and their families to get a glimpse of what life is like for them Show more

Louis travels to Phoenix, Arizona - the capital of dementia care. He spends time with sufferers and relatives, exploring the struggle of living in a world of encroaching shadows. Show more

Documentary. Louis Theroux enters the bizarre world of LA's dogs, meeting the characters whose lives revolve around the city's huge canine population. Show more

Documentary. Louis Theroux explores the American way of death as he looks at end of life care in LA's most famous hospital, the Cedars-Sinai Medical Centre. Show more

Documentary. Louis Theroux spends time in the twilight world of Los Angeles' paroled sex offenders, who live under force of tough regulations. Show more

Documentary. Louis travels to San Francisco where medical professionals are helping children with gender dysphoria transition from boy to girl or girl to boy. Show more

Documentary. 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. Show more

Documentary. Louis takes a look at the issues that some of the estimated one million people in the UK living with the long-term effects of a brain injury have to deal with. Show more

Louis Theroux sets out to understand how a man at the centre of British entertainment and charitable fundraising for decades was able to get away with a long litany of crimes. Show more

Louis Theroux travels to Normandy in France to spend time with rock star Pete Doherty - the iconic and controversial co-frontman of The Libertines. Show more

Louis Theroux spends time in two of London's largest eating disorder facilities to meet women with anorexia - an illness with the highest death rate of any psychiatric disorder. Show more

Louis Theroux embeds himself in a West Virginian community devastated by heroin abuse. He spends time with addicts and follows emergency services that are struggling to cope. Show more

Louis Theroux spends time with American women working in Houston's illegal sex industry and explores the often complex dynamic between prostitute and pimp. Show more

Louis Theroux visits the Milwaukee Police Department as they patrol District 5, home to some of the nation's deadliest streets. Show more