Alex and her friends will have to put their education to good use in Quantico, season 1, episode 15, “Turn.”

The students and instructors will be facing some real life danger that will surely shake things up in the Quantico timeline. This is much more than just one of their assignments, but they will have to pull from everything they’ve learned to get everyone out of this one. We’re wondering if the armed gunman on campus will have anything to do with the terrorist in the Grand Central timeline.

We’re guessing that the episode title, “Turn” is named so because an event like this can be a turning point in someone’s life, and will surely be for the show. While we can’t wait to see which of our favorite characters step up to the plate and which ones crumble under the pressure, there are still a few ongoing issues that need to be addressed! Here are three other things that we’re hoping to find out more about in Quantico, season 1, episode 15,

1. What are Liam and Drew still doing at Quantico?

Last time we checked in at the school, Liam was asked to hand in his resignation due to his indiscretions with Alex, and he was making sure Drew was going to be out the door right behind him. Mysteriously, both of them are very present in the trailer for Quantico, season 1, episode 15.

With Liam’s (potential) resignation, Drew could be in the clear so that would explain his presence. However, we know from the Grand Central timeline that Liam is still an agent and Drew is nowhere to be found. Could this be the last we see of Drew? Since apparently Liam manages to stick around for the future, he must do something to change Miranda’s mind in this episode.

One theory is that Drew, who has taken drastic action against an organization before, could have something to do with the armed gunman, since the attack is so aptly timed with his discovery and his (again, potential) removal from the program!

2. Will we finally get some answers about Mark Raymond?

Caleb’s alter ego has been one of the biggest mysteries plaguing us all season. He made a reappearance in Quantico, season 1, episode 14 and Will is on the case. Is Caleb/Mark who Will is looking for with his weird countdown? We know he’s great at deciphering people, so if he’s getting suspicious, Caleb could be exposed sooner than later.

Showrunner Josh Safran promised in an interview with EW that we will find out what we need to know about Mark in the next two episodes, so we should get some useful information this week.

3. What has Raina been up to, and what will Nimah do about it?

Raina was the only person able to get through to Miranda’s son, so we’re to assume that she’s been skipping out on class and assignments to deal with that situation. We still have no idea what her mission is, but we’re guessing it’s going to be altered by Nimah’s discovery. Quantico, season 1, episode 15 should show us how the sisters deal with the mission going forward. An equally important question though is how their relationship is effected by the dishonesty that has been occurring between them!

Watch the trailer for Quantico, season 1, episode 15, “Turn” below: