Oz and the others are separated from one another within the mind-affecting ruins of Sablier where it's hard to tell what's real and what's illusion. Elsewhere, a solitary Vincent recalls his past and the role he played in the original tragedy.
Vincent and Gilbert's troubled relationship is given some context here and the result is a surprising amount of sympathy for both of them. Even Glen Baskerville shows an echo of humanity in the midst of his coldly plotting catastrophic destruction. Grief can turn people into monsters. So yet again, the assignment of "true villain" shifts. A major reveal also sheds some light on the past, the means of its unfolding, and the purposes of those trying to replicate it in the present. We can only hope the others put together the pieces and figure out a way to stop it soon.