The Doctor is back. Regenerating into a new incarnation and crashing into the life of Jessica Whitehouse, together they must unite to save the world from an old enemy.
The Doctor begins running tests to determined what the power source could be when a bounty hunter known as Zardox has come to kill him based on future events. The Doctor and Zardox face a much greater danger as they venture deep into the TARDIS.
The Series finale, what was originally the 50th anniversary now in celebratory of the 56th Anniversary of the show as every version of the Doctor has been extracted from the time line and placed into their own nightmare.