With an enthusiasm that only comes with youth and ignorance, River sprinted off to the closet to find something to wear. The Doctor stood there quietly trying to mask the feeling that she had slipped out of his fingers once again. "Doctor," Clara inquired, "wasn't that your late wife? How is she here? How can she be here on the Tardis?"
Without looking at Clara, he replied, "The Tardis must have redirected her call… to this moment." He turned to her while placing a hand on the console in gratitude. "She must have known I needed her now." He bent down to retrieve his bow tie off the ground and held it for a moment. "I would always come to her rescue when she called. Now she's come to mine."
"And she's really… alive? She wasn't before and now she is. How can that be?"
"We're traveling in opposite directions. My past," he paused, realizing their roles had reversed, "is her future."
"She hasn't…"
"Not yet."
"Then she doesn't know." He shook his head solemnly. This was perhaps the most unnerving revelation of all. River would know. River always knew. As long as he could remember, River always knew every secret, every line of their story, every spoiler. He had always been her past and she turned the pages for him, slowly revealing their love story to him. But now he knew and, for the first time in a very long while, she was a fresh clean page. "But she's here now, Doctor. She's alive. Couldn't you save her? Rewrite history, change the future somehow," she urged. "Couldn't you at least warn her?"
"Doctor?" River called from another room. The Doctor tucked the bow tie into his pocket and raised a finger to his lips as he looked to Clara.
"Spoilers," he whispered to her as he turned to find his wife.