Louis Theroux will front two brand new documentaries for the BBC later this year.
The journalist and filmmaker, who has interviewed the likes of Jimmy Savile and Max Clifford, will take a look at alcohol addiction and brain injury.
Drinking to Oblivion will be the first film, in which Theroux will spend time with people in the grips of alcohol addiction and the medical staff trying to help them.
The second film, Brain Injury, will explore the long-term effects of brain injury on individuals and their families in the UK.
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Adam Barker, BBC Two Channel Editor, said: “BBC Two is delighted to welcome Louis Theroux back to the channel with a set of films covering British subjects with his usual penetrating documentary gaze and commitment to unpicking complex human dilemmas with highly sophisticated filmmaking
Last year it was announced that Theroux would film a follow-up documentary about Savile.
The controversial filmmaker, who spent three months with the late TV presenter back in 2000, will re-interview those closest to him as well as some of his victims.
Theroux struck up a friendship with Savile- who was posthumously revealed to be a sex offender – after the interview, even staying over at his house on a number of occasions.
A BBC spokesperson said: “At the time, he knew there was more to him than met the eye and, while he succeeded in showing a different side of Jimmy Savile, the darkest side of this hugely complex celebrity eluded him.
They added that, in the new film, Theroux will attempt to “understand the personality of a man who was able to commit such a spectrum of sexual crimes.
“How someone he once called a friend used his celebrity status to commit these crimes; and how the power of this public image afforded him immunity”.
