Gern

Cyber-Controller (PROSE: Doctor Who and the Tenth Planet) Gern was a Mondasian Cyberman and one of the four Cyber-Leaders who led the invasion of Earth.

Gern seized control of International Space Command HQ in Geneva, declaring himself Controller of Earth. Soon after, however, Gern and all the other Cybermen around the world were eliminated when their home planet and power source, Mondas, disintegrated. (TV: The Tenth Planet; PROSE: Doctor Who and the Tenth Planet)

Behind the scenes

 * A supreme Cyber-Controller of the Mondasian Cybermen was visualised in the TV Comic stories Flower Power and The Cyber Empire, wearing a distinct cape in the latter. It is unclear if he was intended to be a surviving Gern, or his successor following the destruction of Mondas.