Karfelon androids were distinguished by their blue skin; Karfelon circuitry was "like tinsel at Christmas" (PROSE: The Taking of Planet 5) but one specialised android was perfectly identical to a Karfelon, yet was puppeted by another android and had wires running from the back of its head. Karfelons also utilised Mustakozene-80 in science experiments and had laser weapons. The scientist Megelen developed time technology including a time acceleration beam and the Timelash and experimented with cloning. His experimenting on the Morlox creatures, which the Karfelons considered unintelligent, was reported by the Third Doctor and brought to a stop. Afterwards, stories of the Doctor were taught in schools and a mural was painted of him.