As Rose battles the murderous Ood, the Doctor finds his every belief being challenged to the core, as the Pit beckons. With the planet threatening to fall into the black hole, the Doctor must make the ultimate sacrifice.




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Episode complete credited cast:
Gabriel Woolf ...
The Beast (voice)
The Ood (voice)


The supposedly servile Ood are now in the control of some type of beast that describes itself as Satan and claims to be a being that has existed since before the creation of the known universe. Rose takes charge and tries to find a way to get everyone out safely. The Doctor and Ida have descended 10 miles into the bowels of the planet only to find themselves trapped there and unable to return to the surface. They find evidence of a ancient civilization and a seemingly bottomless pit where the doctor confronts the beast and finds the solution. The only problem is that the solution may kill Rose. Written by garykmcd

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Release Date:

1 December 2006 (USA)  »

Company Credits

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Technical Specs


| (50 episodes)

Sound Mix:

(Dolby 5.1)


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Did You Know?


The Ood's communication balls/weapons are practical props when the Ood are holding them, but CGI when they are being used as weapons and shocking people. See more »


The cable should have taken several minutes to fall to the bottom of a ten-mile shaft, not just a few seconds. See more »


Toby: [possessed by the Beast] I shall never die! The thought of me is forever, in the bleeding hearts of men, in their vanity and obsessions and lust! Nothing shall ever destroy me! Nothing!
Rose: Go to hell.
See more »


References Doctor Who: Frontier in Space: Episode Five (1973) See more »


Doctor Who Theme
Written by Ron Grainer
Arranged by Murray Gold
Performed by BBC National Orchestra of Wales
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User Reviews

the Doctor vs Satan. Yes please!
26 January 2015 | by (United States) – See all my reviews

Though not entirely obfuscated in the first part of this two-parter - The Impossible Planet - the enemy here is none other than Satan/Lucifer/Prince of Darkness. What makes it clever here is that the writers don't really make it a connection to Christianity; matter of fact in this case, it's an entity who is "before time" - which, naturally, puzzles the Doctor immensely. The plot here continues from the first part where the Doctor and Rose, sans their Tardis which has fallen somewhere miles below on this planet which is being mined and is above a black hole, are stuck in a situation with a bunch of beleaguered, Aliens-esqe space crew and the "Ood", alien creatures who get controlled by Satan and attack everyone on board.

Indeed for the first half this is kind of a giant Aliens homage, or at least that's how I read it. Not that it's a bad thing though, on the contrary it's lots of fun and mostly terror seeing the characters have to maneuver through the ship to get out of the path of the Ood through ventilation shafts (the one guys shooting at the oncoming Ood made me think of it more than anything). Meanwhile the Doctor is at the core of the planet and decides, such as the Doctor will do, to go even further into the 'Pit', where... something may be.

The ultimate showdown doesn't have quite so much action as the Doctor figuring things out in his Doctor-y way (and as David Tenant does with abounding wonder with his "I GOT IT!" moments) as there are other things involved that I shouldn't go into too much (if you haven't seen it by now that is and are reading this). But as cheesy as the CGI for the beast is, it's the human beings that make up what works so well here. Rose is especially compelling, especially among the space crew who are all just trying to stay alive and not let any more people die. There's so much heart here that it's almost a shock this wasn't the season finale; a planet, after all, is sinking into a black hole with forms of Satan riding about, trying to reclaim (lost) power.

But such is the way of this show. Jolly lot!

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