The Master's problem is how to disrupt and rule history without being stopped by extratemporal counterintervention. To get help, he travels in his TARDIS and rescues Merau Varagan, Raor and some Neldorian thugs from the exile planet. Seeking military intelligence, the Three (The Master and the two Exaltationists), helped by the Neldorians, abduct Manson Everard from his New York apartment, the Doctor from UNIT HQ and Captain Jack from Torchwood.
The Time Traveler has redesigned his Time Machine so that it can travel in any direction of space or time as originally intended. He spies on UNIT by traveling through its space-time in order to learn about the mysterious time traveler called the Doctor. Thus, he witnesses the appearance of the Master's TARDIS, the abduction of the Doctor and the TARDIS's disappearance. Traveling back in time and forward in space, the Time Traveler enters the TARDIS. He must now rescue the captives and help them to overcome the Three. He can travel through the space and time within the TARDIS as it travels through external space-time.