Body-donor (Dark Water)

A human man was uploaded to the Nethersphere at the same time as Danny Pink. When Danny heard him screaming when he was first welcomed to the Nethersphere, Seb concluded he had donated his body to science. (TV: Dark Water)

The Nethersphere ultimately perished, however, following the exposure of the 3W Institute and the destruction of Missy's Cyberman army by Danny Pink. (TV: Death in Heaven)