Mena's warlike son and the only young Argolin, created through a secret cloning experiment. He leads dangerous experiments to rebuild an Argolin empire using the generator, dons Theron's helmet, and is ultimately trapped inside, regressing to infancy.
Pangol views the Doctor as an obstacle to his war-forged empire and seeks to imprison him.
Pangol is Mena's biological son, though their ideologies clash severely.
Hardin's scientific pursuits contrast with Pangol's militaristic and xenophobic experiments.
Explore the full interactive character relationship map of Doctor Who: The Leisure Hive