The Doctor looked over his shoulder back at Jack, raising one eyebrow meaningfully while he got out his sonic screwdriver. No, he didn't trust the Master, but he'd give it a shot and he was sure Jack was ready either way. He trusted him.

"Good. I don't want this to get any more painful for anyone." With that he turned back and walked around the pillar, aiming the screwdriver at the Master's cuffed hands and unlocking first one and then the other. Now to see what he'd do.