Cyber-Leader (The Five Doctors)

A Cyber-Leader commanded a squad Time Scooped by Borusa to the Death Zone. It found the Doctor and and fired at them. The Doctor escaped with the Master's homing beacon while the Master tricked the Cybermen into working with him to destroy the Time Lords. They went to a giant chessboard in the Dark Tower. When the Cybermen attempted to cross, they were all electrocuted. The Cyber-Leader asked why the Master had betrayed them. He told him the safe path changed with every journey. When the Master showed the Cyber-Leader the safe path under threat of death, he turned around and killed the Cyber-Leader. (TV: The Five Doctors)