Quantico airs its series finale, which didn't change after ABC announced its cancelation

Deadline

"Well, we finished the season before it aired so we had no idea it would be cancelled," say showrunner Michael Seitzman. "We had to give a genuine season ending but still leave the door open for season 4." He adds: "It didn’t change. This was the season finale, which later became the series finale after the fact." ALSO: Priyanka Chopra tweeted thanks to Quantico fans.