Actor and comedian Steve Cogan has said that the decision to play Jimmy Sewell was not a decision he took lightly.
The new mini-series will chart the life of a pedophile TV and radio star, from his early life to fame, to his great suffering.
Sewell died in 2011 at the age of 84, although he was never brought to justice for his crimes.
He is now considered one of the most sex offenders in Britain.
In a 2016 abuse report, BBC staff missed several opportunities to stop it.
What has the BBC said about the series?
The series will trace Savile to his early years in dance halls in the north of England and to his career with the BBC, as he sought to dispel growing rumors about his life.
The BBC says it has worked with many people whose lives have been affected by Seville’s abuse so that their stories can be told with sensitivity and respect.
The drama will examine the effects of this horrific crime on the victims and many felt it was trying to raise the alarm.
Seville used his involvement with various organizations, including hospitals, prisons and charities, to cover up his crimes.
Kogan, who is best known for his comedy Alan Partridge, said the decision to play the role was not something he took lightly.
“Playing Jimmy Sewell was not a decision I took lightly,” he said.
“Neil McKay has written a brilliant script that sensitively deals with a horror story, no matter how disturbing.”
When will the series air on TV?
The BBC has not yet confirmed the screen date of the series, but filming is set to begin in a few weeks.
Director Sandra Goldbaker added: “Reconnaissance is a unique opportunity to give a voice to the survivors of Saul who influenced the project.
“I’m sure Steve Cogan’s powerful performance as Seville will spark a debate about how the celebrity cult hid him from scrutiny.”