It's time for Quantico's terrorists to step out of the shadows.

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The ABC series will use it's midseason finale to solve the question that has been plaguing Alex Parrish - Who really bombed Grand Central Station? As the budding FBI agent will soon learn, it's not so much a person as a group.

"The terrorists responsible for the bombing of Grand Central Station finally reveal themselves, but instead of answers, more questions remain," ABC teased of episode 11. "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."

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Now that we know there are multiple terrorist, we have to wonder if more than one of the FBI's finest are in on the attack. Nothing is ever quite what it seems when it comes to Quantico

"[Viewers] will not have to wait until the end of the season to learn out who the terrorist was. They may actually get an answer, much, much, much sooner than they think," executive producer Josh Safran previously told Entertainment Weekly. "The question is: Is it the only answer?"

Are you ready for the truth? Catch Quantico Sundays at 10 p.m. ET on ABC.

Tags: Quantico television ABC