Kravos

Kravos was a Kaled officer who worked at the bunker three or four miles from the Kaled Dome towards the end of the Thousand Year War.

Biography
Davros had created and implanted in Kravos's chest a device that kept his heart beating.

When Kravos joined several scientists in objecting to Davros's experiments, he attempted to guilt trip Kravos by reminding him of his life saving operation, but he was undeterred. Later on, Davros had the Daleks exterminate him and the rebels. (TV: Genesis of the Daleks)

Behind the scenes

 * The character was originally named Fenatin in the script. (INFO: Genesis of the Daleks)