Mark Chambers

Mark Chamber's face in a Node.

You may be looking for the counter tenor of the same name.

Mark Chambers was a man who was "saved" by Charlotte Lux in the 50th century to prevent him and four thousand twenty-one other people from being eaten by the Vashta Nerada. His face appeared on a Node. The Node replied to Donna Noble's inquiry about the face, stating that "This flesh aspect was donated by Mark Chambers on the occasion of his death". This terrified Donna, who realised that the face on the node was a real face. (DW: Silence in the Library)