felix purvis remembers when he was there. >> jimmy savile is in the building. because he dressed in this distinctive way, it was kind of like a royal visit when he came. >> savile hobnobbed with royalty, prime ministers even the pope. at that time, he seemed untouchable. >> welcome. come in. >> then prime minister margaret that mucher gave savile a prominent role at the country's psychiatric hospital. the entertainer was a pro level fund raiser. he brought in millions over the years. that gave him free run to many institutions, like the stoak mandeville hospital. savile also had his own room so he could stay the night. in a sign of the times a police detective in the late 1970s did raise the question whether jimmy savile was abusing young girls here but his concerns were dismissed because it was jimmy savile. >> he actually raised a hell of a lot of money for good causes. and you know the threat i suppose into the people who ran those good causes was, well if we cut off a link with jimmy savile we're cutting off our flow of money. >> the police investigation in