Wei

 was Brody's husband in the timeline after Zara stopped the war. He told Abby and Zara about the argument he and Brody had before his death. He regretted this, but told them about Zerbert Condoleezza Wingscampion's party they were arguing about. When the Smoke started attacking, he used fire extinguishers to push them back. The Fifth Doctor asked him to look after Abby. (AUDIO: The People Made of Smoke)