Elizabeth Summers had built her own TARDIS to look like a Gray Flying Saucer.

The Gray Flying Saucer was a Type 14 Exploration TARDIS.

Elizabeth's TARDIS was more outdated than the 12th Doctor's Type 40 Exploration TARDIS and now the Cybermen had control of it.

900 Overlapping Milky Way Galaxies all connected by the Sunnydale Hellmouth's Dimensional Maze Network.

The First Evil's Dimensional Prison was a maze of several Identical Milky Way Galaxies and all of them had Buffy Summers living inside Sunnydale in case the First Evil tried to escape through any of the Hellmouth Openings.

It was an ironically complicated maze created with several Identical Milky Way Galaxies being duplicated by the Pandorica's Big Bang Two going off simultaneously.

Dimensional Mitosis Created Endless Milky Way Galaxies being duplicated with multiple versions of the 10th Doctor roaming around Identical Sunnydale Cities.

This made the 12th Doctor's Job of chasing Elizabeth's Outdated TARDIS harder for him.

Location: Duplicated Universe, Planet Earth.

The 9th Doctor felt the Time Lords returning in sudden shock.

"Doctor, what's wrong?" Rose Tyler asked in response to the alarmed expression on his face.

"Someone opened the Time War and I don't know how!" The 9th Doctor yelled in disbelief before running for his TARDIS frantically.

The 9th Doctor paused as the 10th Doctor's TARDIS appeared and the 10th Doctor walked out and stared at the 9th Doctor in confusion.

Rose Tyler stared at her future self being with the 10th Doctor questioningly while the 9th Doctor glared irritably.

"I think we have a bigger paradox forming around here than we expected." The 10th Doctor says offhandedly.

"Agreed." The 9th Doctor told the 10th Doctor as both Rose Tylers studied each other with their eyes.

"Did you feel the Time War opening too?" The 10th Doctor asked and the 9th Doctor nods his head.

Another version of the 10th Doctor walked out of the Third TARDIS materializing and glanced at the other two versions of himself in sudden disbelief.

The 10th Doctor with Donna Noble looked from the 10th Doctor with Rose Tyler to the 9th Doctor with Rose Tyler in frustration.

"I don't remember this happening at all." The 10th Doctor says in bewilderment.

"Suppressed Memories?" The 9th Doctor asked the 10th Doctor Twins suspiciously.

Another version of the 9th Doctor appeared with a Third Rose Tyler.

"Doctor, what's going on?" The Third Rose Tyler asked.

"Crisscrossed Timeline... I think I can see three Rose Tylers standing in the middle of the street together... get back into the TARDIS before this Paradox gets any worse!" The second version of the 9th Doctor proclaimed and put the TARDIS into full reverse frantically.

The two versions of the 10th Doctor glanced at each other wondering if they should stay or return to their own places in history to avoid causing a paradox.