Listen to this week's Feedback with the lights on because we're talking horror. Radio 4 has just broadcast an adaptation of The Exorcist, the 1971 novel which tells the story of the possession and battle for a little girl's soul and became an infamously head-spinning 1973 film. With demonic possession and very strong language, Radio 4's version was hardly a bedtime story, despite its 11pm slot. So why did they do it? And are the pictures scarier on the radio? Roger Bolton speaks to The Exorcist producer Gaynor MacFarlane and Radio 4's Commissioning Editor for Drama, Jeremy Howe.

Also, what does power really mean? We'll be speaking to the editor of Woman's Hour Alice Feinstein about the launch of this year's Power List. And we'll hear why forensic science can be incredibly moving.

We also discover what happens when a 21-year-old listener plays Roger Bolton for the day? Radio 1Xtra fan Claire Bynoe is our guide to Radio 1 and 1Xtra's Access All Areas - a month-long audience takeover that's seen young people controlling everything from DJs to playlists and watching and listening from all angles. Claire was one of a few listeners chosen to take part in Access All Areas Studios, which gave them the chance to do whatever they wanted in a BBC studio for an hour. She'll be putting Radio 1/1Xtra editor Rebecca Frank and producer Aled Haydn-Jones in the hot seat.

Producers: Karen Pirie and Katherine Godfrey
A Whistledown production for BBC Radio 4.