: The story was initially developed under the umbrella title "Satan Pit" . Key Revisions :
: "I've seen fake gods and bad gods and demi-gods... But if I believe in one thing... just one thing... I believe in her!". [S2E9] The Satan Pit
: Early drafts featured the Slitheen (from Series 1) as the enslaved race on Krop Tor. Russell T Davies later replaced them with the newly created Ood to avoid detracting from the human characters and because new masks could be made within the budget. : The story was initially developed under the