In the original radio series, Satan is fed up "I'm bored with skiing across the lake of fire with a nun lashed to each foot." Maybe two new guests will set him some fresh challenges. And can Satan convince the Professor that all humans are corruptible? Even the Professor's wife. The Professor meets one of his heroes, Leonardo Da Vinci, and Thomas starts to tunnel his way out yet Satan's starting to feel self-conscious about his appearance... Gary leads a demon rebellion against the Prince of "We want staff feedback sessions, more flexible rostering and wider access to nuns and virgins". Its no wonder Satan feels he's not needed any more - so begs ot be let back into Heaven.