(Taking place near the end of their chess match.)
Quietly, Clara looked up at the Doctor, barely daring to breathe as he spoke to her, the words unrealistic and false.
"I suppose I'm the only one who knows how I feel about you," he began to say, and her hand blurred with the speed of which her hand struck his cheek, her eyes narrowed. There was no cry of pain from him, just silence. Amused, he looked back at her.
"Wrong move, Oswald," the Doctor smiled, but there was no kindness in it. The kindness had been replaced with a certain hostility and hunger. "I think you'll find the Doctor very upset over that."
Confused, Clara took a step back, and then she figured out what he was saying and the dread crept into the corners of her mind, threatening to distract her. But she wasn't about to lose to a bunch of metal lunatics.
"I'll discuss it with him later," she answered evenly, not allowing the sudden defeat get to her.
"There won't be a later for him," Mr. Clever sneered, and then his kind act was on again, and the menacing smile returned to his lips. "But maybe there will be for you, if you come to terms with what the Cybermen are doing here and agree to be upgraded. Just accept it. The Doctor is going to, after this betrayal of yours."
The words stung Clara more than anything else, and she found herself getting frustrated, so she stood up as tall as she could, which was a small height, and with a calm but dangerous tone, she whispered, "you're the one tied up right now, buddy, and this was no betrayal to the Doctor. This was a mistake, and we make them all. Emotions? I've got hundreds, and they're mine. It's what defines me. You're just an empty shell running on a man's mind with an IQ that's too high for yours to master or even understand." Her retort was arrogant and brutal, but it definitely had an effect on him. That was when she realised it was a bad effect, because he was just smiling even more.
"Maybe some emotions are good," he laughed. "Frustration. Anger. Hatred. I can see it in your eyes. You want to let it go. But wouldn't it be easier to just drop all of the pain and torment emotions give you. To just... let it go?" his eyes met hers, and she found herself wanting to trust him and just agree. A tiny part of her mind questioned it, but Clara did not. She'd been through so much - she just needed to relax. This was all the Doctor's fault, and Mr. Clever was allowing her a chance here. A safe way out where she wouldn't be killed and would live without pain or sorrow. A part of her struggled against the thought of betraying the Doctor, but the majority welcomed it.
The stress had taken over her mind. She had to.
"What do I need to do?" she inquired, the words slipping out so easily that it seemed she was almost never loyal to the Doctor. This wasn't right. This wasn't her. The stress was finally getting to her.
"Untie me," Mr. Clever answered, his eyebrows raising as Clara looked over at the rope that bound his hands. Could she do this? Was she capable of it? She looked back at his face, and he looked so much like he normally did, all smiles, a ray of sunshine to her. She looked back down at the rope, and without knowing what she was doing, she began to cut it with a pocket knife.