Board Thread:Wiki-Related Discussion/@comment-3202633-20150315034710/@comment-3202633-20150315062650

It's a headache I'll admit. But Adam has confirmed there were 12 episodes in 4A and 11 episodes in 4B, so the "extra" episode has already aired. So the production code, what we see on the script's title page, for "Fall" is 409, but it is the 10th episode of the season. The production code for "Smash the Mirror Part 1," according to Adam, is 408A and the production code for "Smash the Mirror Part 2" is 408B.