The Doctor hung his head in shame. He knew he'd done wrong even from the beginning, when he first decided to run away without warning. He knew he was going to make a lot of people upset, but old habits die hard? It seemed to be his default mode, but that needed to change. Maybe this last time would really be his last time?
He grasped his hands, threading his own fingers together, and placed them thoughtfully upon his lips, then nodded his head "Alright." He looked over at the Master. "I promise. I really do want to make this work. It took us this long to get to this point, I don't want to botch it up."