The Apprentice looked up when he caught motion at the periphery of his vision, smiling at his teacher. It had to be here, with the leather band around one wrist, and shabby pack dangling from her shoulder, and worried expression on her face. He reached out, touching her mind to let her know he was all right.
"He showed me how to make walls for my mind." He shared the conversation with the Doctor, his smile fading into an anxious expression, one hand coming up to rub at his cheek.