Priyanka Chopra, Quantico Priyanka Chopra, Quantico

Quantico's super dramatic promo for Sunday's episode promises the "biggest twist yet": "There's another bomb out there," Alex (Priyanka Chopra) says. So, is there?

"I can't say if there definitely is one, but that's one of the theories we stumble upon," co-star Johanna Braddy tells TVGuide.com. "There is something you'll see that supports a [possibility] of one. It's not just a random guess. Alex is the one who figures it out first."

The framed agent comes to that conclusion after stumbling upon key intel following the leak of FBI files that ties back to an old piece of evidence. Next is deciding exactly what to do with that information. "Even if there is a second one, to [the FBI], that doesn't mean she's not part of it or the first one," Braddy adds. Alex won't mull over her options for long: Her ultimate decision by the episode's end might be a bit surprising.

Quantico airs Sundays at 10/9c on ABC.