![](https://image.tmdb.org/t/p/original/iVM27i25vrgmScXM7eqEmEbaL2B.jpg)
![](https://image.tmdb.org/t/p/w342/uR09aQEIFFCCHqahGzOLU7VRKtU.jpg)
Alien Avatar
Following The Thames being heavily polluted by an alien chemical, K9 discovers the alien "Medes" are imprisoned by Drake and they need a special "key" to be made for the release of their spaceship.
![](https://image.tmdb.org/t/p/w300/rk4Af1Q378VQuuliP8RGHvDwtiR.jpg)
![](https://image.tmdb.org/t/p/w300/o57bYy8LhACTqaj7RIhKODNawfI.jpg)
Other episodes for this season
![Regeneration](https://image.tmdb.org/t/p/w300/htyk1RtpxO3MmMH8wEdYzRUuj3W.jpg)
![Liberation](https://image.tmdb.org/t/p/w300/sI8NmBktK15bjl0e8fFwjZxcqxn.jpg)
![The Korven](https://image.tmdb.org/t/p/w300/iePrrnbwyshi33sS6P83WKmejoM.jpg)
![The Bounty Hunter](https://image.tmdb.org/t/p/w300/vUTeY4BGptyRLYwyNAdRXLGiFkm.jpg)
![Sirens of Ceres](https://image.tmdb.org/t/p/w300/pvpo4kGAvY3vRQtnNB5ZdFCsC1x.jpg)
![Fear Itself](https://image.tmdb.org/t/p/w300/jTXNhd5ZrEEzOlHTpPUxN45w6tZ.jpg)
![The Fall of The House of Gryffen](https://image.tmdb.org/t/p/w300/Zqf1B58XfSeUWpWropR3HY34QE.jpg)
![Jaws of Orthrus](https://image.tmdb.org/t/p/w300/kbM3O3pu7MDaNm36AxC5dikyk44.jpg)
![Dream-Eaters](https://image.tmdb.org/t/p/w300/oRyA9ROROLXfkv864s1dnMYAZDj.jpg)
![The Curse of Anubis](https://image.tmdb.org/t/p/w300/kqsUaN87OOCBsJYnJ5fCQ3wTZi5.jpg)
![Oroborus](https://image.tmdb.org/t/p/w300/tatbI5HhyOYUt1vCVLM2PRU8Nqd.jpg)
![Alien Avatar](https://image.tmdb.org/t/p/w300/iVM27i25vrgmScXM7eqEmEbaL2B.jpg)
![Aeolian](https://image.tmdb.org/t/p/w300/2NyVsYOkiMli6MVkphTpnw77e15.jpg)
![The Last Oak Tree in England](https://image.tmdb.org/t/p/w300/iSSlmFOE7IR2SU7BZr4waDuUP5q.jpg)
![Black Hunger](https://image.tmdb.org/t/p/w300/vRViFOLpeOLQ70K9ezDOPoMp8vb.jpg)
![The Cambridge Spy](https://image.tmdb.org/t/p/w300/oItjfFB66JOxEA9jyAQ0xcq1OBY.jpg)
![Lost Library of UKKO](https://image.tmdb.org/t/p/w300/xp9dxtwmk1qFDhz7zUXiPEGFIut.jpg)
![Mutant Copper](https://image.tmdb.org/t/p/w300/jt90HiUkPX4RFLYPqZZGX5JVdKW.jpg)
![The Custodians](https://image.tmdb.org/t/p/w300/cCjJ1SMZIykWvy1Y6RFsHwODbIa.jpg)
![Taphony and the Time Loop](https://image.tmdb.org/t/p/w300/osy1O95FdiekvrH2rF1ywJc5lZ.jpg)
![Robot Gladiators](https://image.tmdb.org/t/p/w300/eIS6LNm6tgUd9ruyX0IYXtlZRwK.jpg)
![Mind Snap](https://image.tmdb.org/t/p/w300/rGXrniOFKr6OvEOXqSa3sEfMMoW.jpg)
![Angel of the North](https://image.tmdb.org/t/p/w300/9ZS0OPVZNYU4F4a4T3qfhN60afG.jpg)
![The Last Precinct](https://image.tmdb.org/t/p/w300/gbvs2frXbpL3xp07qA82gNz5DjL.jpg)
![Hound of the Korven](https://image.tmdb.org/t/p/w300/zuXlwSY0ahM5mRlGBpHFFcQTzim.jpg)
![Eclipse of the Korven](https://image.tmdb.org/t/p/w300/iKbOdKDHQvAv0goqs0cLzemSLRa.jpg)
Following The Thames being heavily polluted by an alien chemical, K9 discovers the alien "Medes" are imprisoned by Drake and they need a special "key" to be made for the release of their spaceship.