Among the many mysterious moments 'Falling Skies' season 4 glimpsed during the recent New York Comic-Con trailer, one silver-haired young lass caught our eye in the final moments. We finally have an explanation for the new player, as 'Harry Potter' franchise vet Scarlett Byrne has been confirmed as a regular for the intriguing new role.

Deadline first revealed news of the casting, though the 'Falling Skies' season 4 trailer included a shot of the as-yet-unnamed character gazing up at the moon, which new series showrunner David Eick ('Battlestar Galactica') revealed to be an important unifying image for the many splintered character factions over the season. Byrne's character has been identified as "a mysterious young woman with special powers and an unusual connection to the alien invaders," while Byrne herself will act as a regular on the series, after playing Pansy Parkinson in the final three 'Harry Potter' films.

Along with ‘Falling Skies’ season 4's expansion to 12 episodes and news of Mira Sorvino's casting, the TNT drama has also added Treva Etienne, who will play new resistance Dingaan Botha. So far, we know that Eick has plotted multiple separations of the core characters, drawing inspiration from ‘The Empire Strikes Back‘ in telling parallel stories for its cast. Season 3 addition Robert Sean Leonard has been confirmed to return for at least one episode as Dr. Roger Kadar, while Gloria Reuben will not reprise her role of Marina Peralta.

We've included the 'Falling Skies' season 4 trailer to re-watch below, and in the meantime, tell us what other mysteries of the trailer you want to see explored when the TNT alien actioner returns in summer 2014!

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