As Rose battles the murderous Ood, the Doctor must grapple with a monster that challenges his every belief: the Beast.
“The Satan Pit” is the ninth episode of the second season of the British science fiction television series Doctor Who. It is the second part of a two-part story, following “The Impossible Planet”. With the TARDIS seemingly lost, Rose and the remaining humans are trapped on the base with the possessed Ood, while the planet floats helplessly towards a black hole. Meanwhile, the Doctor is about to discover exactly what “Beast” is trapped in the heart of the impossible planet.