The Eleventh Doctor and the Ninth pulled out their sonic screwdrivers and pointed them at the Master.
"Oh, Doctor, you're better than this, you know sonic probes don't do anything to an organic life-form," said the Master.
"It's a sonic screwdriver!" said the Doctors, and put them away.
"Master, get your TARDIS out my TARDIS, you'll blow a hole in the fabric of reality you don't," said the Eleventh Doctor.
"Calm down, Doctor, and listen. You did deduce that you are in a dimension different from your own. But there was one thing you do not know about this certain dimension," said the Master.
"What's that, then?" asked the Ninth Doctor.
"You never stole the TARDIS. Earth is now a godforsaken ball of death. The only humans alive are in small numbers on colonies. They are an endangered species. The Doctor perished in the first days of the Time War. Executed by the Dalek Emperor himself in the first days of the Time War. He was only in his second body. I took my own TARDIS, and traveled space and time in his honor. You...you seem to have survived. You've nearly used up all your regenerations. But the situation is more dire than you think," he said.
"Why? What's going to happen?" asked the Eleventh Doctor.
"The TARDIS engine was cracked open, making a doorway into your universe. All of our history, everything that will happen in our history, will replace yours. You will cease to exist, and the universe won't have its greatest hero...The Doctor."
"What do we have to do?" asked the Ninth Doctor.
"You must go into the TARDIS engine and close the breach on the other side. The process is quite simple, just a simple activation with a sonic prob--"
"Wait. From the other side? We'll be trapped. Trapped without the TARDIS," said the Eleventh Doctor.
"I know. Which is..." the Master's voice cracked. "...which is why I'm closing the breach. You just have to crash your TARDISes together and you'll be back in your universe, and whatever has happened to the other me in your universe will happen to me. I'll...become
"No. You can't. You still many regenerations left. I don't. Trenzalore. The fall of the Eleventh. Maybe this is where I die. Trapped on a distant world without my TARDIS. Kind of an undeserving death for The Doctor," said the Eleventh Doctor.
"No, no. I have no place in any universe anymore. I'll be closing the breach. Whatever happens to you on Trenzalore is not happening now. You just need to find the other TARDIS. Good luck, Doctors."