Cyber-Leader

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You may be looking for the Leader of the Mondasian Cybermen

The Cybermen from Pete's World designated a Leader when they invaded Earth in our universe in 2007. The Cybus Cyber-Leader was identified by black handle bars on its helmet. When the Leader was destroyed, the information it had was downloaded into another Cyberman who would become the new Leader.(DW: Army of Ghosts / Doomsday)

See also

The Cyber-Controller (cybus) (Cyber-leader's superior).