Board Thread:Wiki-Related Discussion/@comment-2153169-20150712041546/@comment-26159109-20150712111931

There is no such thing a hour. Episode is one hour length. They have stated numerous times that Smash the Mirror is two episodes and that the 100th will be 5x11 and it will air as the spring premiere and that the season will be split 10/12. They count the episodes just fine. Season 4 has 23 episodes. So in total 89 episodes + 11 = 100.

This isn't a matter of opinion anymore (not that it ever was). Smash the Mirror is two episodes and people just have to except that.