Kreos
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Kreos is the leader of the Thal Military when the First Doctor, Susan, Ian and Barbara returned to Skaro more than 50 cycles after the events of The Daleks[statement unclear]. (AUDIO: Return to Skaro)
Biography
When the Doctor, Susan, Barbara and Ian arrive at one of the mast towers on Skaro, two armed Thal guards, Adoni and Gerasus, exit the mast and order them to stay where they are and that they are in a restricted zone. Kreos approaches telling Adoni to stand down and lower there guns, he apologises for Adoni's enthusiasum and asks them who they are, when the Doctor introduces himself, Kreos realises that this is the same Doctor and his companions that helped libarate Skaro and the Thals from the Daleks. Susan asks Kreos how Alydon and Dyoni are, but Kreos tells her that the time of Alydon and Dyoni has passed, however their descendant Damadus now leads the Thal people and offers to take them to him.
The Doctor asks Kreos what these towers are, as they were not on Skaro when they first arrived, Kreos takes them inside the mast and explains that this mast is the control station for the mast network in this region and that Adoni and her team can control more than 30 masts from this location. Kreos explains that these masts where created to reduce the level of background radiation left over from the neutronic war, by using the electrical discharges generated from the masts to ionize the atmosphere, reducing the half-life of radioactive particles in the atmosphere by a factor of 10, to which the Doctor agrees as neutron radiation is an ionizing radiation.
Kreos tells them that there are mast all across Skaro, although not all of them are complete and that the operation only started 2 years ago by the Thal's foremost scientist, Tryana. (AUDIO: Return to Skaro)