Second depth: at some point you reach the gate that is locked and some knight is trying to unlock it. He says something like "free captured knight while i unlock it", after freeing all of them and getting back to this gate he says "great timing". Everything seems fine here.
Third depth: you start surrounded by 4 knights (and judging by their looks, they are not the ones whom you freed during previous depth, that's kinda odd...). And near the starting point you see the locked gate and the knight trying to unlock it. The funny thing is that he says the same thing - "free captured knights", but it doesn't make sense, no one is captured... After talking to each one of 4 knights and getting back to the gate, he says "great timing". Something is definitely wrong with this poor guy. :)