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A return to form as the Doctor and Bill battle a monster beneath the frozen Thames in early 19th century London, only to find the real monster is above ground.

A quick trip in the TARDIS turns into a bit of a nightmare.

After a whole year off, we finally have a regular episode. It looks like it was worth the wait.

After a year off, the Doctor returns in a witty, whimsical Christmas special.

An amusing and romantic Christmas special that re-unites the Doctor with River Song in a final farewell.

A solid episode with many strengths to end the series. The hybrid story arc is wrapped up (well, mostly), however, the resolution with Clara was a bit of a let down.

An extraordinary, if occasionally slow-paced, episode with a very clever premise and a jaw-droppping cliffhanger.

A solid, clever episode that is ultimately dominated by the death of Clara.

The climax to the two-part Zygon story has a memorable scene from the Doctor but did not live up to the first episode.

An episode built on a very interesting premise, but with rather uneven execution.