A Cyber-Lieutenant was part of a patrol of Cybermen that were Time Scooped by Borusa to the Death Zone.
It fired at the Fifth Doctor and the Tremas Master, later forcing the Master to lead the Cybermen to the Dark Tower. (TV: The Five Doctors) The Cyber-Leader ordered the Lieutenant to take the patrol across a chessboard-patterned floor and they were all electrocuted. The Master retrieved the Lieutenant's gun and used it to kill the Leader. (PROSE: The Five Doctors)