Secondly, as far as I know, these episode titles are correct. Episode 12 is the only one not they haven't announced as they're holding that back, similar to last year.
1. Partners in Crime
2. The Fires of Pompell
3. Planet of the Ood
4. The Sontaran Stratagem (1 of 2)
5. The Poison Sky (2 of 2)
6. The Doctor's Daughter
7. The Unicorn & The Wasp
8. Silence in the Library (1 of 2)
9. River's Run (2 of 2)
10. Midnight
11. Turn Left
12. TBA
13. Journey's End
Episode 6 is the one that jumps out at me.