As soon as Clara passed out, she found herself in a strange room with Madame Vastra, Jenny and Strax. "So glad you could make it," Madame Vastra said, handing Clara some tea, which she took.

"Where am I?" Clara asked.

Jenny leaned forward. "Exactly where you were, but sleeping."

"Time travel has always been possible in dreams," explained Madame Vastra. "We are awaiting only one more participant."

"Oh, no," Strax groaned. "Not the one with the gigantic head." "It's hair, Strax," Jenny corrected.

"Ugh! Hair..." Strax said when River Song poofed in in a cloud of smoke. "Madame Vastra," River said.

"Professor," Madame Vastra said. "Help yourself to some tea."

"Why, thank you," River said, poofing a glass of wine up for herself.

"How did you do that?" Jenny asked.

"Disgracefully," River said, then her gaze turned to Clara. "Clara."

Clara tilted her head. "I'm sorry. Do I know you?" she asked.

"No. But you will," River told her. But Clara only stared back at River. This Clara hadn't met her yet. "Professor River Song. The Doctor might have mentioned me?"

"Oh, yeah. Oh, yeah. Of course, the Doctor has. Professor Song," Clara said. "Sorry. It's just that I never realised you were a woman."

"Well, neither did I," Strax said, making Clara feel better.

"Perhaps we should get down to the business at hand," Madame Vastra said, breaking the awkward silence.

"That might be good, dear, yes," Jenny agreed.

Madame Vastra nodded and through some particles into the air, which formed themselves into a picture. "Clarence DeMarco, murderer. Under sentence of death, he offered us this in exchange for his life." Madame Vastra waved her hand, and the picture turned into Gallifreyan.

"Space-time coordinates," observed River.

"This, Mr DeMarco claims, is the location of the Doctor's greatest secret." "Which is?" Clara asked.

"We don't know," Jenny said. "It's a secret."

"The Doctor does not discuss his secrets with anyone, my dear," Madame Vastra said. "If you're still entertaining the idea that you're an exception to this rule, ask yourself one question: What is his name?"

Clara stared Madame Vastra. "Well, I know it," River said.

"What? Clara asked, turning to face River. "You know his name? He told you?"

"I made him."

"How?"

"It took a while."

"So … So you were a friend of his, then?"

"A little more than a friend. A long time ago."

"He's still never contacted you?" Madame Vastra asked.

"He doesn't like endings," River said while Jenny gasped. However, no one noticed. "So what else did this DeMarco tell you? He didn't just buy his life with some coordinates. How did he prove his value?"

"One word only." "What word?"

"A word I've heard in connection with the Doctor before. Trenzalore." "How exactly did he describe what he was giving you?"

Madame Vastra waved her hand and transformed the pictures into the face of DeMarco, which said, "The Doctor has a secret, you know. He has one he will take to the grave. And it is discovered."

"You misunderstood," River said.

"Ma'am," Jenny started to say. "Sorry, I … I just realised I forgot to lock the door."

"It doesn't matter, Jenny," Madame Vastra said. "What misunderstanding? Tell me."

"No, ma'am, please...I should have locked up before we went into a trance."

"Jenny. It doesn't matter."

"Someone's broken in. Someone's with us. I can hear the intruders."

"Jenny. Are you all right?"

"Sorry, ma'am. So sorry. So sorry, so sorry. Think I've been murdered," Jenny said as she faded out.

"Jenny?" Madame Vastra asked.

"What's happened to her?" Clara asked. "Jenny, can you hear me?"

"Speak to us, boy," Strax said. "Jenny!" cried Madame Vastra.

"You're under attack," River said, slowly getting up. "You must wake up now. Just wake up! Do it!" And with that, River slapped Madame Vastra's cheek, prompting her to wake up. "You too, Strax. Wake up now," River said, throwing her wine in his face, which caused him to wake up.

Both Clara and River then went to each other as Whispermen came into the dream conference, surrounding them. "Tell the Doctor. Tell the Doctor," they whispered endlessly.

"Tell him what?" Clara asked as the Great Intelligence (in Walter Simeon's appearance) appeared, made up of dream particles.

"His friends are lost forevermore," the Great Intelligence said. "Unless he goes to Trenzalore."

"No, you can't say that," River said. "He can't go there. You know he can't."

But, for Clara, her dream state was weakening. She could slowly hear the Doctor calling out. When she did, she found herself staring up at the Professor. "Hey," she said, smiling.

"You all right?" He asked.

Clara nodded, sitting up slowly with her head in her hand. "I think so."

"Good," the Professor said as he helped her up and went with her to find the Doctor, who was in the hall, blindfolded.

"Artie?" The Doctor called out. "Am I getting warm? Am I getting warm? Look, I'm pretty sure you must tell me if I'm getting warm. I'm-m-m-m pretty sure that's in the rules."

"Doctor?" Clara asked.

"Ha, Clara!" The Doctor said. "How are you. Don't worry. Everything is under control."

"What are you doing, Dad?" The Professor asked.

"Oh, um … Mr Maitland went next door, so I said I'd look after the kids. They wanted to go to the cinema, but I said, "No." I said, "No. Not until you two finished … canoodling." I was steadfast."

"Doctor … We were not canoodling," Clara said firmly.

"Did you say canoodling?" The Professor asked.

"Well, no," the Doctor said. "They came up with that by themselves. And they ... they suggested that we play Blind Man's Bluff...So … Where are they?"

The Professor waved his hand, which made the blindfold on the Doctor dissipate. "My guess is they tricked you so they can go to the cinema."

"The little … Daleks," the Doctor said, then noticed a severe look on Clara's face. "What's wrong?"