The title of each episode in season one is the very last word said in that episode.
All scenes shot in the locker rooms, gym, workout rooms, medical clinic, and combat gym were filmed at the Quebec national sport institute located inside Montreal's Olympic stadium. The Training center did not shut down during filming, Olympic and Paralympic athletes simply trained around the actors between shots.
For every episode in season 2, the first and last songs are sung by the same artist.
"Quantico" was once the original title for another FBI procedural called Criminal Minds which is also produced by Mark Gordon. It was thought that Quantico wasn't a catchy enough title to entice audiences.