Quantico: "Inside" ( 1x11 Promo ) Winter Finale

The terrorists responsible for the bombing of Grand Central Station finally reveal themselves, but instead of answers, more questions remain. While back at Quantico, the recruits receive a well-deserved few days off for the holidays, but not everyone is oh so merry when secrets are revealed and lines and blurred, on “Quantico” Sunday, December 13th on ABC.