Once a national treasure, now the most vilified man in the UK, one year on from his death Jimmy Savile was branded as the worst sex offender the UK has ever seen. In October 2012, an investigation into Savile began, prompting hundreds of victims of child sex abuse to come forward to 28 police forces. Allegations dated back to 1955, but how could such a high profile entertainer with such a prolific background in abuse, go apparently undetected for so long? We talk to the victims, family members and former colleagues of Savile to lift the lid on one of the biggest scandals this country has ever seen.