Let's see:
Nine/Jen
Seems like we might be missing one but I can't remember. We just finished the angels (that was the "season finale") so we are just starting Berlin and the ex.

Ten/Summer
They did Slitheen twice (first and then after Venice they went back and finished it). Then Water on Marks and then Dalek in the Middle ages.
I believe we just wrapped up (or were wrapping up) the Daleks (also season finale). We have not yet started the Christmas one.

Future Episode:
- Crossover 
- Mini Summer (if I remember correctly).
...?