|Place of origin:||Earth|
|Main actor:||Mark Heath|
Ralph Adebayo was a crewmember on the Moonbase. He was a geologist and acted as a general handyman.
He was working in the food stores with Ben and noticed that some of the food sacks had holes in them. When he sent Ben on an errand, he was abducted and partially converted by the Cybermen and used by them to work the Gravitron controls. (TV: The Moonbase)