The Satan Pit - Production

Production

Russell T Davies said that in order to inspire the design of the Beast, he sent the visual designers at The Mill images of paintings by Simon Bisley, a comics artist known for muscular grotesqueries. In the episode commentary, Davies said that an early draft of the script called for the role of the Ood to be filled by the same species as the Slitheen. Their race would have been enslaved and they wished to awaken the Beast, whom they believed to be a god that could free them. Davies claims credit for naming the Ood as a play on the word "odd".

The scenes with the Beast and the Doctor were filmed at Clearwell Caves, last seen as the Sycorax ship in "The Christmas Invasion". The Sanctuary Base 6 corridor set was recycled to become the entrance to the set for Totally Doctor Who. According to the DVD commentary, the final scene in the TARDIS where the Doctor says "the stuff of legend" was the last major scene shot for the 2006 series, and the last to feature Billie Piper (whose actual final episode had been filmed weeks earlier). It was not, however, the very last scene filmed for the season, which was the "cliffhanger" scene at the very end of "Doomsday".

Davies also mentioned that one of many unused ideas for a creature in this episode would be used in series three, this turned out to be the Toclafane from "The Sound of Drums"/"Last of the Time Lords" as revealed via Davies comments in Doctor Who Magazine Series Three Companion.