Recently BBC Radio4extra asked on its Twitter feed for questions to be put to Peter and Nicola for an extended interview.
That interview is now available to listen to online:
http://www.bbc.co.uk/programmes/p00kmz8r It should be available internationally.
Enjoy!
(Be warned, I've not heard it yet, so I've no idea how spoilery it is - listen at your own risk!)
ETA: I've now listened - spoilers for 10.02, and also S9, and they discuss the finale of S10 in general terms (Nicola tells Peter he can't give anything away!)