The Ninth Doctor saw the alarm about history reshaping itself and extended the Temporal Shields of his TARDIS around the NX Class Starship Enterprise to avoid Rose Tyler being erased from the current history panickingly.

The Ninth Doctor didn't care that another version of himself and Rose Tyler would take their place when history reshaped itself as their TARDIS crashed inside it because he wanted his own Rose Tyler protected even if he had to push them both outside of the normal timeline until it finished reshaping itself to do it!

Both NX Class Starships seemed to appear out of thin air inside of Vulcan Space.

Captain River Song of the Starship Bad Wolf and Captain Maximilian Forrest of the Starship Enterprise quickly hail the Vulcans who are very confused about how they got there for repairs.

Meanwhile the Ninth Doctor's TARDIS was being found by the Starship Enterprise as history repeated itself in the reshaped timeline.

The only difference was the Enterprise 1701-J fighting the Dalek Armada with Time Torpedoes and Molecular Disruptor Cannons beside three Aeon Type Timeships in Earth Orbit.

The two versions of the Ninth Doctor's TARDIS had detected the Dalek Flying Saucers attacking the Planet Earth, but both Ninth Doctors had a hurt Rose Tyler to deal with at the same time and are both retreating from the Daleks hunting them down.

"What just happened? Why did the Unknown TARDIS turn into two versions of itself?" The Monk Time Lord demanded panickingly.