Did Katy Wix want to leave Ghosts? ... Sherlock: Benedict Cumberbatch stars a modern day Sherlock Holmes, teaming up with Martin Freeman's war veteran Dr Watson to solve impossible crimes.

Ben Willbond and Laurence Rickard talk exclusively to RadioTimes.com about Katy Wix's shock departure from BBC sitcom Ghosts in season 4.

Katy Wix, right, played Mary on the show Credit: BBC The character Mary left BBC series Ghosts during season four. She had been a resident of the haunted house since the very first episode .