The Sontaran’s were really good in this story and it was quite interesting to see that Sontarans have goatees. The idea that Sonatrans are actually cloning people is something that has never been explored in Doctor Who before which is kind of weird when you think about it. The look of the Sontaran is quite nice as it is quite colourful compared to previous adventures the idea that they have some sort of lackey seemed quite unlike Sontaran behaviour but worked quite well in setting up the story. The cliffhanger was the most dramatic that has ever happened in Doctor Who (well probably the second after 29.11 – Utopia). Sontarans chanting made them seem more
menacing and made them fell more dominant.
David Tennant was on good form as the Doctor as usual, his scene with Donna when he thought she was leaving him and then he realised what was going on was amusing and added a bit of light relief. Catherine Tate was continuing to improve as Donna and her first meeting with Martha showed how far she has come since The Runaway Bride. Freema Agyeman’s return to the show was a welcome addition to the story and the Martha we see in this story is not only different from her time in Series 29 but even different from her Torchwood run. Its nice to see that the infatuations with the Doctor have all but gone. Bernard Cribbins who I think is one of the best casting decisions done by the BBC Wales team was brilliant as usual as Donna’s granddad, when he realised that the man that Donna had gone away with was the same man he saw at Christmas it seemed as if RTD had been planning this from the beginning (if we didn’t know what we learnt from the first DWC of the new series).
Whilst it isn’t the best episode of the series so far it is still a damn fine episode and makes me confident that The Poison Sky will make a fine second parter in what has been a strong start to the 30th season of Doctor Who.