Episode Guide:
Episode 1 - Partners In Crime
Modern - day London, and a brand new diet pill is being tested by the mysterious Adipose industries. Donna is determined to find the Doctor again - even if it means braving the villainous Miss Foster and her hordes of sinister Adipose.
Episode 2 - The Fires of Pompeii
The Doctor and Donna arrive in Pompeii, AD79 and its volcano day! But there is far more to worry about, psychic powers and stone beasts run riot in old Pompeii, but can Donna dare the Doctor to change established history?
Episode 3 - Planet of Ood
The Doctor takes Donna to her first alien world - and its freezing! Ood-Sphere reveals some terrible truths about the Human Race. On meeting the Ood again The Doctor is determined to find out the truth about their servility.
Episode 4 - The Sontaran Stratagem
Martha Jones summons the Doctor back to modern-day Earth, but an old enemy lies in wait.
With the mysterious ATMOS devices spreading across the world, Donna discovers that even her own family is not safe from the alien threat - but is it too late to save them?
Episode 5 - The Poison Sky
The Sontarans activate their masterplan and begin to choke the whole of planet Earth. UNIT is left defenceless, with a traitor in their ranks. And as interplanetary war edges closer, the Doctor has to fight to keep both Martha and Donna alive - but will he have to make the ultimate sacrifice?
Episode 6 -The Doctor's Daughter
The Doctor meets the most important woman of his life on the distant planet Messaline, in the middle of an endless war. But as General Cobb threatens genocide, and Martha is kidnapped by the Hath, the Doctor faces an even greater battle - can he find peace with his own child?
Episode 8 - Silence in the Library
One hundred years ago, the Universe's greatest library was sealed off with only a cryptic warning as explanation: "Count the shadows."
However, it now appears that the shadows are on the move again. The Doctor and Donna must uncover the terrible truth behind the Nodes and the horrifying Data Ghost to uncover the Library's secret.
Alex Kingston, Colin Salmon and Steve Pemberton guest star in p art one of this two-part story.
Episode 9 - Forest of The Dead
As the shadows rise and march, the Doctor forges an alliance with the mysterious River Song. But can anyone stop the Vashta Nerada?
While the Doctor discovers long-buried secrets and revelations about his own future, the sinister Nodes declare that Donna is doomed.
Episode 10 - Midnight
The Doctor is trapped, alone, powerless and terrified, on the planet Midnight. Soon, the knocking on the wall begins. Only a woman called Sky seems to know the truth - but as paranoia turns into a witch-hunt, Sky turns the Doctor's greatest strengths against him, and a sacrifice must be made...
Episode 11 - Turn Left
Donna's entire world collapses, but there's no sign of the Doctor. Instead, she finds help from a mysterious blonde woman - a traveller from a parallel universe. But, as Donna and Rose Tyler combine forces, are they too late to save the whole of creation from the approaching darkness?
Episode 12 - The Stolen Earth
Earth's greatest heroes - including Sarah-Jane Smith (Elisabeth Sladen) and The Torchwood team - assemble in a time of dire need. But can the Doctor's secret army defeat the might of the new Dalek Empire?
With battles on the streets and in the skies, the Doctor and Donna must brave the Shadow Proclamation to find out the truth. However, a fearsome old enemy waits in the shadows.
Episode 13 - Journey's End
The entire universe is in danger as the Daleks activate their masterplan, in this gripping conclusion to the series. The Doctor is helpless, and even the Tardis faces destruction. The only hope lies with the Doctor's secret army of companions - but as they join forces to battle Davros himself, the prophecy declares that one of them will die.