Christopher C. Polk

	Human, Cyberman
	Euro-Space Administration, C-Programme
	Earth
	The Harvest
	Mark Donovan

You may be looking for Polk (The Moonrakers).

Christopher C. Polk, more commonly known simply as Polk, was one of over twenty individuals, all pilots or Science Officers with the Euro-Space Administration, who volunteered for cybernisation as a part of C-Programme in 2021. After he was converted to Cyberman, Polk attempted to kill Ace and Hex. (AUDIO: The Harvest)