Cyber-Commander (Code Silver)

A Cyber-Commander of the Cyber-Mainframe assisted in Hive Section 49's attempted invasion of the Earth of N-Space, starting with the UNIT base Fortress Island. (AUDIO: Code Silver) It was destroyed, along with all the other invading Cybermen, by, when he used his temporary status as the "Cyber-Master" to connect the dimension gate to N-Space to infinite parallel Earths, including the Earths that the Cybermen failed to commence full dimension seeding on, poisoning their power supply. (AUDIO: Master of Worlds)

Behind the scenes
Although this Cyber-Commander is never referred to by name in AUDIO: Code Silver or AUDIO: Master of Worlds, its name is listed in the credits.