Cassandra O'Brien's third husband

On the day of Earth Death in the year 5,000,000,000, the Lady Cassandra O'Brien.Δ17 made reference to her third husband, who had been succeeded by at least two more; recalling the legend that said the Earth ostrich had a wingspan of fifty feet and blew fire from its nostrils, Cassandra jokingly suggested that she was refering to her third husband. (TV: The End of the World)