Mark Mathias

Dr Mark Mathias was a friend of Hex who worked in the same department. He was manipulated by Hex and Ace in 2021 after he was taken by the Cybermen. (AUDIO: The Harvest)

Hex later inquired about him during the 2025 London evacuation. Oracle informed Hex that Mark was infected with "the contagion", and transformed into a zombie of sorts. (AUDIO: Project: Destiny)