The Doctor glanced at it, then returned his attention to the TARDIS.
His head snapped back up to the thin metal chain she was holding up, his brow wrinkled, his mouth slightly open. He dropped the sonic screwdriver, letting it clatter to the floor. He moved around the console, ignoring the random screeching noises the device emitted as it clattered to the floor.
He snatched it out of her hand roughly, ignoring the startled look on her face. He stared at it, his mouth gaping. "Crystal..." He said slowly, not looking up at her. "Do you remember anything about your true home planet? About your people? Anything at all?"