"Well it's rather obvious, isn't it?" the Eleventh Doctor asked. He was standing against his TARDIS with his arms crossed seemingly upset by something.

"Oh do enlighten us, won't you?" the Twelfth Doctor said with a roll of his eyes.

"She doesn't want us to leave just yet," Eleven replied as he inclined his head towards his TARDIS. Each Doctor had decided it was best to get back in their respective TARDIS' and let the time streams correct themselves. However once they had all found their way to each of their TARDIS' and started to take off they had all landed in the same time and place.

"That hardly seems possible," the Ninth Doctor remarked. "Besides, what is the significance of the Tower of London?"

"I think we're about to find out," the Tenth Doctor replied. The Ninth Doctor looked in the direction that Ten was looking and noticed a group of men wearing black armor flanking a woman. It was Kate Stewart.

The Twelfth Doctor approached Kate first as the other three Doctors watched. "Am I to assume it was your fault that we all ended up here?"

"Indeed," Kate replied.

"What's with the cavalry?" Ten questioned.

"I applaud your victory, but that victory did not come without a price," Kate replied.

"What do you mean?" Nine asked.

Kate turned to the Ninth Doctor. "Her Majesty has been murdered," Kate said with the utmost contempt. "The Royal Family places the blame on you and has requested a meeting with the United Nations, the very group that holds jurisdiction over UNIT."

"So?" Eleven said. The other Doctors looked to him. "Well honestly, what can they possibly do?"

"A request has been made by the Royal Family that the alien known as the Doctor be banned from the planet Earth permanently and not just from here on out but from any point in time; past, present or future," Kate replied.

"Well that's simply impossible," scoffed Nine.

"You would be surprised," Kate stated. "However I have managed to persuade the UN of one last thing."

"What is that?" Twelve asked.

"It seems that danger follows you no matter where you go," Kate began, "but more so when there is more than one of you. You were summoned here to the Tower of London for one purpose and one purpose only."

"What purpose is that?" the Tenth Doctor asked walking over to Kate. Immediately the soldiers in black took up arms and aimed their weapons at the Doctor who simply rolled his eyes but kept his position.

"At ease," Kate said. The soldiers lowered their weapons though hesitantly. "You are to ensure that your time streams never cross. It has come to our attention there are Laws of Time that are not being adhered to."

"This is absurd!" Nine exclaimed. "You can't ban us from this planet!"

"It is our planet and we can do what we please, Doctor!" Kate said with as much malice as she could muster. "I was blind to the damage you've left behind, but no more. You will go into the conference room inside and find a way to avoid this from happening again."

"Well if we're banned from Earth it can't happen again, now can it?" Twelve said though Kate knew he wasn't serious.

"I know that it is an impossible request, Doctors," Kate said with a sigh. "I also know that you probably won't adhere to the ban but do try, won't you? I won't be able to help you should you decide to break the rules."

"What does the United Nations have up there sleeves that will prevent us from going in the past? What about the versions of us that are already there?" the Tenth Doctor questioned.

"I'm afraid the amount of information I've been given on the matter is on a need-to-know-basis," Kate said. "You only have a few hours, I suggest you head inside."

"The Brigadier wouldn't let them do this," the Eleventh Doctor said as the soldiers marched the four Doctors to the Tower of London.

"Well he isn't here, now is he?" Kate said. Her voice was full of remorse.