Haldoran was a 22nd century Earth dictator who wanted to take over New London.
Sometime during the war, London gave his then-seventeen-year-old daughter Donna to Haldoran to marry in an attempt to create peace. Haldoran then tortured Donna and constantly attempted to impregnate her, until it as discovered she was infertile. He then divorced her and instead took her cousin, Brittany, and bore twelve kin with her. He warned Donna that if she ever returned, that he would make her life with him seem pleasant.
Sometime later in the war, he met a man named Estro, who offered Dalek guns in exchange for power in the taken over New London. "Estro" was actually The Master in disguise, attempting to steal a Dalek weapon, who had created the war out of boredom. The Master supplied the weapons, but also began draining power from the base. When Haldoran inquired why this was happening, "Estro" claimed it was to power the new weapons.