This is part of a series of reviews of Doctor Who in chronological timeline order.

Previous Story: The Paradox Planet

What a satisfying conclusion to the last one. Probably my favourite 4DA story so far. The reveal that the planet's present declaring war on it's past is the cause of the pollution and extinction of species that led to the planet's present declaring war in the first place was incredible. You're given just enough clues to piece it together right before the Doctor and it hits hard. K9 being worshipped was loads of fun and played into the story extremely well.

I'm a sucker for timey-wimey stories and this one is the timiest-wimiest story I've witnessed thus far.

Next Story: Gallery of Ghouls