It's poised to start next week finally. The new episodes are titled:

4.1 Partners in Crime
The Doctor runs into Donna while investigating the strange side effects of a weight-loss drug at Adipose Industries.

4.2 The Fires of Pompeii
The Doctor takes Donna to Pompeii the day before Vesuvius erupts.

4.3 Planet of the Ood
The Tardis randomly arrives at the Central Ood Facility and the Ood are starting to revolt.

4.4 The Sontaran Stratagem
Martha summons the Doctor back to Earth after some suspicious global murders are linked to technology from Atmos Systems.

4.5 The Poison Sky
The Sontaran's are forced to accelerate their invasion plans after the Doctor begins to interfere.

4.6 The Doctor's Daughter
On the planet Messaline, in the middle of an endless war, the Doctor meets the most important woman of his life.

4.7 The Unicorn and the Wasp
In 1926, Agatha Christie disappeared for 10 days. Was it amnesia? A nervous breakdown? Or a Giant Alien Wasp..?

4.8 Silence in the Library
One hundred years ago, the universe's greatest library was sealed off, leaving only one warning: "Count the shadows". But now, the shadows are moving again. The Doctor and Donna must uncover the terrible truth behind the Nodes and the horrifying Data Ghost, to find the library's secret.

4.9 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.

4.10 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.

4.11 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?

4.12 The Stolen Earth
Earth's greatest heroes assemble in a time of dire need, 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...

4.13 Journey's End
The entire universe is in danger as the Daleks activate their masterplan. 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.