Acosta assures that the reason for the pseudo scar "totally makes sense" once you learn Nathalie's backstory, as will her disdain for Alex (Priyanka Chopra). Quantico airs Sundays at 10/9c on ABC. Crave scoop on your favorite TV shows? E-mail questions to mega_scoop@tvguide.com or drop us a line at Twitter.com/TVGuide.