Mechanical Mech Men

The Doctor describes mechanical men as rogue machines capable of being extinguished by deactivator gas, though at lethal risk to any nearby robots using the substance. The term refers to faceless automatons enforcing tyranny, indistinguishable in form from D84 except by loyalty. Their mechanical nature is contrasted with D84's visible hesitation to act against his own kind, emphasizing the cold precision of their subjugation.