Late UK entertainer Jimmy Savile created his TV shows to gain access to children, says a child protection expert and criminologist who helped expose paedophilia claims against him.
Former police detective Mark Williams-Thomas has been making a follow-up program to his original ITV1 documentary into allegations the star sexually abused vulnerable teenage girls.
He told the Radio Times that in the previous program, it was unclear what came first, but he can now say "very clearly" that Savile created his television series as a vehicle for his offending.
"I believe he engineered his programs within the BBC and Radio Luxembourg in order to gain access to children," he said.
"The classic examples are Top Of The Pops, Savile's Travels, Jim'll Fix It - all of them gave him access to young children. That's why there were so many victims."
He told the magazine the follow-up documentary would show Savile's offending behaviour spanned four decades and many hundreds of victims.
"This isn't just someone who offended only against 13, 14 and 15-year-olds," he said.
"It's someone who offended against 10-year-olds."
The second program, Exposure Update, investigates the full length of the TV star's four decades of abuse, from Radio Luxembourg in the 1950s, where he presented the Teen and Twenty Disc Club.
The documentary also looks at how Savile got away with his abuse for so long, and whether the establishment turned a blind eye.
Mr Williams-Thomas, who was due to be part of the original Newsnight investigation which was abandoned, admitted he was wary about the involvement of compensation-seeking lawyers, because, he said, people might wrongly begin to question the victims' motives.
He said victims he had spoken to for the new program "don't want a penny".
"They just want the truth to be on record, to be listened to, to be believed," he said.
He said his focus was never the BBC, but always Savile.
"This was a man who made it his hobby to open up every single door that he could. At the height of his fame, there wasn't anywhere he couldn't go," he said.
"I think there will be further arrests over the forthcoming days, weeks and months of people who were party to offending alongside Savile."