At NASA mission control, a fleet of spaceships is detected approaching Earth. The President is informed, and receives an ultimatum from Tannis. He must surrender immediately, or a bomb will be dropped on London. The President receives a telephone call from the British Prime Minister, who informs that counter-measures are being taken. The bomb explodes in the ship before it is launched, and to Tannis's shock, a fleet of shuttles emerges from behind the Moon. Tannis then himself receives a message from Brigadier Lethbridge-Stewart, and some of his ships are destroyed.