Board Thread:Wiki-Related Discussion/@comment-15736398-20141111181225/@comment-15736398-20141111190419

"Smash the Mirror" will, in the end, be two episodes aired as one, as I outlined above.

This is confirmed by the following:


 * Adam's tweet about Smash the Mirror having a second hour "being in addition to the 22 episodes we already had planned"


 * ABC's formal announcement about extending the season's episode order by one (which came shortly on the heels of Adam's tweet)


 * A subsequent tweet from Adam about the season being 23 episodes long

If you want further examples of this kind of thing happening beyond the two I referenced above, see the following:

"Encounter at Farpoint" (Star Trek: The Next Generation episodes 1x01 and 1x02, aired as episode 1x01)

"All Good Things..." (Star Trek: The Next Generation episodes 7x25 and 7x26, aired as episode 7x25)

"Emissary" (Star Trek Deep Space Nine episodes 1x01 and 1x02, aired as episode 1x01)

"Way of the Warrior" (Star Treek Deep Space Nine episodes 4x01 and 4x02, aired as episode 4x01)

"What You Leave Behind" (Star Trek Deep Space Nine episodes 7x25 and 7x26, aired as episode 7x25)

"Broken Bow" (Enterprise/Star Trek Enterprise episodes 1x01 and 1x02, aired as episode 1x01)