An Earth scientist brought to Argolis to develop rejuvenation experiments, initially faking progress but later successfully perfecting the time experiments with Romana's help. He frees the Doctor and Romana and ultimately places Mena into the generator.
They collaborate on scientific efforts to address the Argolins' post-war crisis.
Mena funds and authorizes Hardin's rejuvenation research for her species.
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