Doctor Who: The Satan pit

The Doctor and Rose travel to Krop Tor – an impossible planet orbiting a black hole, defying the laws of physics. With the TARDIS lost to them, trapped with a crew of human explorers and their alien servants, the Ood, they find ancient ruins... and something far older and darker stirring beneath the surface. Whispers speak of a malevolent force imprisoned since before time – something that even the Doctor fears. As seismic horrors rise and minds begin to fracture, one terrifying question remains: What if the Devil is real?