ABC has ordered an additional 6-episodes, bringing this season to a total of 19 episodes. There is also still a chance that the episode order could expand as the season moves forward – granted the ratings continue to be favorable.
Based on the first couple episodes, I am really liking this show. I didn’t expect to like it, but I am so happy I gave it a chance anyway – because it impressed me, as I mentioned in my post about the premiere.
Source: Quantico Lands Full-Season Order