While the Doctor, the Professor and Clara were running through the future TARDIS corridors, the Great Intelligence - who was in the form of Walter Simeon - stood at the entrance to the tomb. He had with him some of the Whispermen and Madame Vastra, Jenny and Strax. The Great Intelligence faced the doors to the grave, thinking aloud to himself. "The doors require a key. The key is a word. The Word is the Doctor's."
"Here I am," the Doctor said when he, the Professor and Clara arrived. "Late for my funeral. Glad you could make it." The Doctor turned around and saw Jenny, which he acknowledged. He was glad that she was alive.
"Open the door, Doctor," the Great Intelligence said. "Speak and open your tomb."
"No."
"Because you know what's in there?"
"I will not open those doors."
"The key is a word lost to time. A secret is hidden in the deepest shadow and known to you alone," the Great Intelligence mused at loud to the Doctor. The Doctor walked up to the figure. "The answer to a question," the Great Intelligence continued.
"I will not open my tomb," the Doctor said severely, standing face to face with the Great Intelligence.
"Doctor … What is your name?" The Great Intelligence asked. The Doctor just stared at his foe – standing his ground – when the Great Intelligence moved his hand to the Doctor's face and squeezed it. The Doctor took his hand, placed it around the waist of his hand, and slowly pulled it away. The Great Intelligence walked around the Doctor, facing the others. "The Doctor's friends ..." he continued, "...Stop their hearts."
The Professor looked horrified at the sound of the threat and turned to Clara. "I will not lose you," he began and rose his right hand to her chest.
Clara looked at him, a bit frightened at what was happening. "What are you doing?" She asked.
The Professor didn't answer her. Instead, he waved his hand over her chest, leaving a shield of gold over it – which dissipated after a few seconds. "A protection spell … So no one can reach into your chest to get at your heart."
Clara faintly smiled at the idea. She was happy that she would be safe, but her mind raced to think about the Professor. "What about you?" She asked. "I mean, I want you safe too."
The Professor nodded and placed his right hand on his chest. He reached inside, letting out a gasp. He then pulled out a heart surrounded by golden regeneration energy. He put the heart in his left hand and did the same again, pulling out another heart. He handed Clara the two. "I want you to have them. In the meantime, anyway. My hearts will be safe from the Whispermen."
Clara took them slowly and carefully. "I thought that someone couldn't take the hearts of a Time Lord...?"
"Well, there's never been a Time Lord with magic before. Only a Time Lord with magic can take the hearts of other Time Lords. I'm the only one."
Clara nodded slowly and pocketed the two hearts safely in the two boxes that the Professor had just poofed up. She then looked around at the surrounding area where the Whispermen were attacking the Paternoster Gang. "Prof … What are we going to do?" She asked frantically.
"I don't know … Just stay behind me..." the Professor said, grabbing her hand. He raised his left hand in front of them, feeling magic build up in his palm. He would throw the magic at the Whispermen, but they stopped attacking, and the doors to the tomb opened. The Professor looked around. "Dad ...Did you say your name?" He asked.
The Doctor shook his head. "I didn't do it," he said, going over to his friends, making sure they were okay. "I didn't say my name."
The Professor turned to Clara, who gave him his hearts back. He smiled his thanks, and one by one, he put them back into his chest.
They all regrouped and faced the doors to the tomb. "Now then, Doctor Simeon..." the Doctor began, " … or Mr G. Intelligence, whatever I call you. Do you know what's in there?"
"For me, peace at last," the Great Intelligence said. "For you, pain everlasting. Won't you invite us in?"
Before entering his tomb, the Doctor took a deep breath and went up to the doors, pushing them open with a grunt.
