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.
Louis spends time at the specialist liver centre at King's College Hospital, London. He meets patients in the grips of alcohol addiction struggling to find a way out.
The broadcaster joins Jewish settlers on the Israeli-occupied West Bank, examining how they live amid constant tension and conflict.
Louis meets parents who have turned to medication to keep their children under control.
Louis travels to Johannesburg, where the residents find themselves increasingly besieged by crime, as he concludes his look at the issue of law and disorder in this volatile and crime-ridden city. Despairing of the capability of the police and the courts to protect them, many residents have turned to an industry of private security offering protection for a price. Are the sometimes brutal methods of these private police really a solution, or just another part of the problem?
British documentarian Louis Theroux examines the toll meth has taken on several addicts in Fresno, California.
Louis Theroux, our favorite reporter goes into Philadelphia to document the horrors the residents and officers see daily. This intriguing documentary shows the public what life is like in a very real and non-glamorized way, something we rarely see in American news outlets.
In 1997, Louis Theroux made a documentary about the world of male porn performers in Los Angeles. 15 years later, he returns to find a business struggling with the deluge of free porn on the internet. Louis revisits some of the original programme's contributors as well as meeting the latest crop of porn performers dreaming of porn stardom.