Kravos

 was a fictional soldier and a minor character featured in the original Doctor Who television series. Played by actor Andrew Johns, he first appeared in the sixth chapter of the 1975 serial (season 12), "Genesis of the Daleks".

Biography
Kravos was a member of the humanoid race known as the Kaleds. Born on the planet Skaro, he was a member of the Elite Military Corps and served during the Thousand Year War against the Kaleds' hated enemies, the Thals. Like most of the Military Elite, Kravos was subservient to the members of the Elite Scientific Corps led by the crippled mutant Davros. At some point during his career, Kravos was greatly injured and Davros saved his life by replacing his heart with an artificial battery. When Davros began production of a race of genetically mutated killing machines known as Daleks, many members of both the Science and Military Corps rebelled against him, including Kravos. Davros lamented his underling's betrayal, saying that the heart he once saved has now turned against him. Davros summoned a squad of Daleks into the main laboratory and ordered them to exterminate all of the resistance members. Kravos tried to stop Davros, but he was caught in the blast of a Dalek energy cannon and killed.

Notes & Trivia

 * The character of was created by David Maloney and Terry Nation.