Gern

Gern was one of the four Cyber-Leaders who led an invasion of Earth by the CyberMondans when Mondas returned to Earth's orbit in 1986.

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