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A Cyber-Lieutenant assisted the Cyber-Leader in their attempt to acquire the Nemesis in November 1988. With it and a fleet of thousands of Cyber-Warships, they intended to conquer Earth and turn it into New Mondas.

The lieutenant objected to the leader making reports to the fleet, to which the leader responded "You are outside your function."

He and another Cyberman were about to kill Ace when the Seventh Doctor fired the rocket-sled's engine at them, destroying the lieutenant and his comrade. (TV: Silver Nemesis)