Hilary Pink was a conscientious objector to the First World War. While John Jarrow was away fighting, Hilary had an affair with Jarrow's wife Gwen Carlton. Liam Jarrow was the result of that affair.
In 1933 Marpling, a device from the far future arrived in the town and turned a group of wasps hyperaggressive and gave them the ability to possess people. They killed Charles Rigby and used him as a host. During a confrontation, Rigby coughed up some of the wasps which stung Pink, killing him. The Seventh Doctor did an autopsy and found that Pink's body had mutated from the wasp's venom, but the process stopped due to his death. (PROSE: Eater of Wasps)
