Martha Jones secretly returns to England. Its been a year since the Master took over the Earth and launched the invasion. Humans are now a captive race and the Toclafane are building a fleet of rockets they will use to attack other worlds. The Master takes great pleasure in humiliating the Doctor and has Marthas family doing menial chores. Martha has a plan, however, and all she has to do is get in to see the Master. When she learns of the origin of the Toclafane, she realises the paradox they have created.
This is a Region 4 disc, the local region for Australia.