Once the government had agreed to hand over the children, the ambassador decided to wipe out the last remnant of the race's last visit to Earth and killed Clement McDonald with a hypersonic sound wave. (TV: Children of Earth: Day Four) However, this proved to be the ambassador's undoing; Torchwood sent the same signal back at the ambassador, seemingly killing it as bursts of its blood splattered against the inside of its container. However, the contents of the container were removed from the Earth in another pillar of flame before the creature's death could be verified. (TV: Children of Earth: Day Five)