In an alternate timeline in which Germany won World War II, Popplewell (who preferred to be known as Pop) became the leader of the British resistance. He assassinated the Reichsinspektor General at the Festival of Britain. He later watched as the Doctor's TARDIS was taken away by members of the Britischer Freikorps, then told the Seventh Doctor and Ace what had happened. He recommended they visit Ma Barker's café.