Every week our biggest Doctor Who fan Lizo will be bringing you his verdict on the week's episode of Doctor Who before it's even hit your screens!
Here's what he thought of the ninth episode from the second series: The Satan Pit.
'When I first heard the name of this episode a few months back, I wasn't really paying attention and thought that it was called The Santa Pit and that it was the name of this year's Christmas Special.
I couldn't have been more off the mark - this second part of the story that began with the Impossible Planet is the darkest, most intense episode since Dr Who returned last year.
Things pick up with the Doctor facing an opening chasm deep under the planet, while on the surface Rose and the crew of the base are under attack by the sinister Ood.
Are they about to come face to face with the Devil himself? And will they all survive?
There's action aplenty, but the biggest thing about the epsiode may well be a few words which could have a huge bearing on this series or the next. You'll know them when you hear them!
It'll probably be debated for months what they mean, if anything. Things aren't made clear as to whether it's just a passing comment or a massive clue about the future.
This aside, the characters including the Doctor are forced to go further than they've been before, face up to their greatest fears and risk death. As they come up against an enemy unlike they've ever faced before.
The Doctor doesn't know everything
One of the things that's great about seeing the Doctor in action is how he knows much more than the people around him.
But here there's even more pleasure to be had from seeing him having to think on his feet as he disocvers things that are beyond even his knowledge.
Fans will love the non stop action, as well a throw away comment about the Kaled race! And, naturally, Torchwood gets a quick mention.
Despite being a two parter, there's a lot left unexplained by the end which is a shame. But all in all an outstanding episode that's all that Dr Who should be - the stuff of legend.
We're now into unknown territory though. We've seen clips for several weeks in trailers from all the stories except for the next two, Love and Monsters, and Fear Her.
It should be fun to see how in these two stories we've seen nothing of, things ramp up to the climax at the end of the series. Can't wait!
Lizo's star rating for The Satan Pit: 4 out of 5.