This season two double-part episode concludes in grand fashion, with one of the largest visual effects in the show's history and some bleak choices, that no doubt resonated with the cast (as this was the last episode shot with Billie Piper as a series regular).
With the Odd now firmly under control of The Beast (Gabriel Woolf) the crew must fight for their lives to try and either regain control or escape the mining platform. The Doctor (David Tennant) and Ida Scott (Claire Rushbrook) are now trapped in the mine, with no way to return to the surface, so with no other option available to them, decide to head further into the pit and see what lurks beneath.
The most striking visual, probably of the whole run so far, is the Doctor coming face to . . . well, torso, with the giant CGI horned beast that is imprisoned at the bottom of the pit. It's not entirely successful, perhaps lacking a little weight to truly convince - but it's certainly a sight to behold. The rest of the episode is solid pay offs to the aspects that were set up last week. There's a real theme of sacrifice, as Jefferson sacrifices himself for his comrades and The Doctor and Rose are both willing to sacrifice themselves (and each other) to keep the Beast contained.
Even though a couple of the moments did ring true logic wise (why does the beast laugh when he understands that The Doctor will have to sacrifice Rose to contain him, either he's just a body driven by rage, or he's not) this was a really good second part of the story. It was good to see Rose take control, and use her training to get the crew back working, and this episode has the most explicit suggestion so far that her time on team Tardis might soon be coming to an end.