Plus: What happened to Nimah?
Warning: This story contains major spoilers from Sundays episode ofQuantico.
But unlike the trainees, future Alex and Shelby deal with an actual terrorist:Drew!

Credit: ABC/Phillippe Bosse
Yup, the former NFL star and FBI trainee reveals himself to be (one of?)
Still, how exactly did Drew pull all this off?
Is the nuke on the truck the nuke theyd been looking for?
And what about the events in the Quantico timeline what exactly happened between Nimah and the agent she shadowed?
EW spoke with showrunner Josh Safran for answers.
When did you make that call, and why Drew?
It came together more and more as we moved forward.
What exactly are Drews motivations for terrorizing Alex and the city?
Is it out of hatred for the FBI or an obsession with Alex?
That was the motivation, not so much what he has against Alex.
Will we find out exactly what caused the shaking?
No, you will not.
Theres no way of ever knowing.
You will find out next week.
That is a good question youve picked up on.
This is someone whos been able to change things.
Keep in mind what the Voice has done.
They have their fingers in everything.
As for the nuke in the truck, thats the only nuke, right?
The one Will helped build?
That is the only nuke,thenuke.
That is the end game.
Are we going to find out what Alex uploaded onto Ryans computer?
And what about Simon?
Will we find out what happened to him?
And is he in bad shape?
On the Quantico side, we saw the cast getting to pull off some close combat scenes.
What was it like putting all that together?
It was a great way to show how present-day Quantico training pays off in the future.
Did the cast get competitive shooting those fights?
No, not at all, we have great stunt people.
Yasmine [who plays the twins] was just like, Yes!
I get to fight.
I dont want to do this.
She would venture to take him out of it as the fight was going on.
Does Shelby actually leave Quantico?
The fire is back in a big way.
Finally, after her date with the Richmond agent, Nimah returns looking ill.
This was very difficult for her, but she was able to do it.
Quanticoairs Sundays at 10 p.m.