Collapse / Everything changes is the fourth level of Chapter 4.
Dialogue
Madame Vastra: As suddenly as the rollercoaster ride started, it stopped.
Madame Vastra: With a thud and what sounded like a sigh we landed, and the TARDIS powered down.
Madame Vastra: Looking back the TARDIS, the eternal "she", really didn't want us to land.
Madame Vastra: It took the Doctors a full five minutes to get her to reboot,
Madame Vastra: They didn't even have time to greet their latest incarnation who stood to one side shaken and confused.
Madame Vastra: When the reboot was complete and the doors could open again,
Madame Vastra: One of them said the fateful words "I guess we should take a look outside..."
Madame Vastra: As the first glimpse of light shone through the thinnest crack between the TARDIS doors the Doctors vanished.
Madame Vastra: No sound, no fanfare, they were just gone. As we all looked around.
Madame Vastra: Not believing what we had just seen, the doors opened wide and I heard two words...
Madame Vastra: "Hello Sweeties."