The BBC have released the official synopsis for the second episode of series 8 - "Into the Dalek":
A Dalek fleet surrounds a lone rebel ship, and only the Doctor can help them now... with the Doctor facing his greatest enemy, he needs Clara by his side.
Confronted with a decision that could change the Daleks forever he is forced to examine his conscience. Will he find the answer to the question, am I a good man?"Into the Dalek" will air on BBC1 on Saturday 30 August 2014.