Williams places the Doctor under a mind probe, but it indicates the Doctor is telling the truth. Refusing to believe it, Williams orders increased power, but eventually the probe overloads. The President orders that the Doctor be sent to the Lunar Penal Colony where political prisoners are exiled for life, while Jo remains on Earth. Williams and the President receive records from the Dominion government of Sirius IV, an Earth colony planet that has achieved a degree of autonomy from Earth. The records "prove" the Doctor and Jo are citizens of Sirius IV as well as career criminals. A commissioner from the Dominion has arrived to claim jurisdiction — who is in actuality the Doctor's old enemy, the Master.