I'm just missing something, and can't quite remember the plot:
- There are cracks in the universe
- Time Lords calling through them
- Doctor wants to answer
- Church wants to stop Doctor
- Church's Kovarian chapter separates to take matters on its own hands
- Kovarians break the TARDIS' time capsule
- TARDIS blows up, creating the cracks in the universe
Why doesn't the Kovarian chapter just not destroy the TARDIS' time capsule? The cracks would not exist, the Time Lords would not call, and the Doctor would not answer any question.
This would rewrite history... which is not a bad thing... (The Doctor does it alllll the time)