British filmmaker Louis Theroux has spoken of his uncomfortable interviews with the victims of Jimmy Savile after failing to expose the entertainer as a sexual predator during the making of a documentary 16 years ago.

Theroux spent three months with the man who would be revealed as a prolific sex offender years later, and famously quizzed him on-camera about allegations of abuse.

English disc jockey Jimmy Savile presenting the BBC music chart show 'Top Of The Pops', UK, circa 1973. Photo / Getty
English disc jockey Jimmy Savile presenting the BBC music chart show 'Top Of The Pops', UK, circa 1973. Photo / Getty

He went on to maintain a friendship with Savile, even staying on occasion at the former

Jim'll Fix It

presenter's house.

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In a new film to be aired in the UK on Sunday, Theroux will revisit the subject to try to "understand the truth more fully" by talking to Savile's victims, friends and family, including those he was introduced to by the DJ.

Theroux said he only noticed a clip of Savile embracing two women in an "overly physical way" in 2001 when he looked back at the raw footage during the making of the new program.

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English disc jockey and TV presenter Jimmy Savile with his secretaries, Barbara Counsel (left) and Christine McCarthy, on the beach at Scarborough, Yorkshire, September 1966. Photo / Getty
English disc jockey and TV presenter Jimmy Savile with his secretaries, Barbara Counsel (left) and Christine McCarthy, on the beach at Scarborough, Yorkshire, September 1966. Photo / Getty

His first program was made before allegations over Savile's sexual offences had been made public, and Theroux said that in hindsight it was "tempting to see clues everywhere".

He recalls a "random comment" on a tape in which Savile "referred to his bed as an altar, because that's where the 'sacrifices' happen".

"Or in the overly physical way he embraced two women at Leeds' Flying Pizza restaurant one evening, which I only noticed looking back at the rushes," he adds in the BBC Magazine article.

English DJ and television presenter Jimmy Savile joins a group of under-privileged and disabled children on a day out to Southend. Photo / Getty
English DJ and television presenter Jimmy Savile joins a group of under-privileged and disabled children on a day out to Southend. Photo / Getty

Included in Sunday's program will be interviews with four of Savile's victims, which Theroux admitted were "slightly uncomfortable" given his history with the entertainer.

He feared the victims would see him "as yet another person who failed them, by not doing more to expose Jimmy Savile while he was alive".

The filmmaker said one of the victims felt Theroux had been "hoodwinked" by Savile when they saw the initial documentary.

Sir Jimmy Savile died in October, 2012. Photo / Getty
Sir Jimmy Savile died in October, 2012. Photo / Getty

In October 2012, a year after his death at the age of 84, a documentary called

The Other Side of Jimmy Savile

broke the story of the sexual abuse scandal.