- Deleted Scene:
- The Doctor and Rose's introduction to the Ood originally went on a little longer, with Rose awkwardly taking up the Ood's offer of refreshment, fumbling her way through an order. Then the Ood call for Mr. Jefferson, calling the Doctor and Rose "unauthorized visitors", which the Doctor finds harsh; he prefers "friends you just haven't met yet." Which is exactly how the lead Ood introduces them when Mr. Jefferson comes in a moment later. Mr. Jefferson, annoyed, hits the translator sphere out of that Ood's hand, prompting a harsh chiding from Rose.
- The only significant edit made in postproduction was a sequence in which the Doctor uses the drillhead to detect the sound of a heartbeat emanating from beneath the planet's surface.
- What Could Have Been:
- Originally, the Slitheen were going to be in this episode. or, more specifically, another family from the planet Raxacoricofallapatorius - with the idea being that they had become enslaved by humanity. The Raxacoricofallapatorians secretly believed that the planet being explored was actually the dwelling place of their god, who would free them from servitude. However, Russell T. Davies ultimately became concerned that the presence of the returning monsters was detracting from the humans whose pioneer spirit he felt was at the heart of the tale.
- The planet was originally named Hell.
- Billie Piper's former husband Chris Evans was planned to voice Satan.
- You Sound Familiar: Satan was voiced by Gabriel Woolf, who famously voiced Sutekh the Destroyer who was also said to have gone by "Satan", so fan-theorists, make of that what you will.
Trivia / Doctor Who S28 E8 "The Impossible Planet"