Mafia 83. Doctor Who: Aliens in London

Can you help me solve the clue?

I'm not very good at solving clues :( I usually don't do that in games. But it seems like the clue here might point to the murderer of Morny, maybe someone from the yeti or cybermen team, or maybe the Master, Dalek, Brigadier, or even the gifted Zoe. I'm not sure, but it's probably something related to steel, the research center, UNIT, iron, fists, a disfigured body, books, World War II, exile, or London. I don't remember exactly where I put it.