The Ending of the End & The Last Problem

Officially these don't air until later today, but we've always had the afternoon to discuss new episodes, so here we go:

The Ending of the End (Part 1):
xxNightmareMoonxx
Vault 99

The Ending of the End (Part 2):
xxNightmareMoonxx
Vault 99

The Last Problem:
xxNightmareMoon
Vault 99