The Best Episodes Written By Louis Theroux

America's love affair with prescription painkillers has led to widespread dependency on opiates. But following a crackdown on their over-prescription, where does this leave the two million Americans who have developed a habit for these high-strength painkillers? With the pills now becoming increasingly expensive and scarce on the black market, vast numbers of Americans have turned to the cheaper and stronger opiate: heroin. The drug now claims more lives in the US than either car accidents or gun crime. And, for the first time in over two decades, life expectancy in the US is declining - largely attributed to the rise in fatal heroin overdoses. In Huntington, West Virginia, Louis Theroux embeds himself in an Appalachian community that is being devastated and stretched to its limits by widespread heroin use. With one in ten babies in the city born dependent on opiates and a fatal overdose rate 13 times the national average, this is the epicentre of the most deadly drug epidemic in US history. Louis spends time with the user community caught in the vice-like grip of drug misuse and follows the emergency services struggling to cope with multiple overdoses each day.

In Dallas, Louis meets TV evangelists Marcus and Joni Lamb, and joins a group of hardline Christians called The Family as they visit the Deep Ellum entertainment district.

Louis travels to the American North West, a place where survivalists, white separatists, and paranoid "freedom fighters" are arming themselves against the "New World Order". Meet the "radical nuts" and "noodles" who shoot first and ask questions later.

Louis Theroux immerses himself in Florida’s multimillion-dollar rap scene - as notorious for its controversy as its creativity.

Louis visits 73-year-old Jimmy Savile, the miner who became a TV and radio star.

Louis joins Paul Daniels and Debbie McGee in their home beside the River Thames and on the road as the magician appears on Celebrity Ready, Steady, Cook and his wife launches a ballet company.

Louis follows the former Tory MP and his wife as they try to make a living as "objects of curiosity". The film features Louis on the sofa with a tipsy Christine, and following Mr and Mrs Hamilton when they are arrested over an alleged sexual scandal (both were cleared later).

A prickly encounter with the Conservative politician in which Louis upsets her by asking about her possibly non-existent sex life and hears about her love of poetry and cats.

Louis joins the ex-boxer at home, in the ring and on a trip to buy jodhpurs. Eubank attempts a tongue twister and pontificates on being a role model for children.

Louis meets the ventriloquist who no longer enjoys the TV light entertainment limelight (and can't hide his bitterness about that) but is still earning a good living. He has a flash car, an ex-model missus, a large home and a role in Crewe's pantomime.

Louis meets the PR guru/media manipulator as he handles Pop Idol judge Simon Cowell and child star Declan Galbraith and organises a charity do involving Westlife.

Louis has a close encounter with the community of hardcore UFO believers in the South West of America - but not even an illicit foray into the ultra-top-secret Area 51 military base and a garbled message from the planet Koldas can answer all his questions.

Louis strips off and plunges into the world of Porn. From the glossy high-end productions to the sleazy "gonzo" flicks, he gets intimate with the men and women who bang for bucks. But is it all as fun as it seems? And what happens when you can't "get wood"?

For hundreds of years, romantic relationships in western society have been based on the idea of monogamy: two people, together, for ever. But with nearly half of all US marriages ending in divorce, perhaps the traditional model is no longer fit for purpose. In Love Without Limits, Louis travels to Portland, Oregon, the heart of a movement seeking to rewrite the rulebook on how we conduct intimate relationships and experience family life. Portland, whose city motto is 'Keep Portland Weird', is seen as the US capital of polyamory and ethical non-monogamy, the practice of openly and transparently having multiple relationships that go further than just sex. Louis embeds himself with families who have made the bold decision to open up their relationships in a number of different ways, whether inviting others into existing relationships or allowing partners to seek romance elsewhere. He discovers that for many, more partners means more love and more happiness. But for others, multiple relationships have led to jealousy, upset and broken hearts.

Louis Theroux meets the latest incarnation of the American far right: a political movement born out of the internet and increasingly making its presence felt on the political stage.