After five seasons of a captivating blend of sci-fi, family drama, horror and war stories, “Falling Skies” is coming to an end. The TNT show’s series finale airs this Sunday.

Drew Roy’s character, Hal Mason, the oldest of son of Tom Mason (Noah Wyle), is a 17-year-old lacrosse hotshot when an alien invasion pushes Earth’s remaining humans into post-apocalypse survivor mode. Hal has to grow up fast as he becomes one of the 2nd Mass’ strongest fighters, as he watches his girlfriend get turned into an alien weapon, and as he ventures into a dangerous mission to save his younger brother from the clutches of the Skitters. Hal’s journey got wilder when he was turned into “evil Hal” in season 3 thanks to the grotesque Espheni eye worms. Roy delivered an impressive performance as he balanced the eye worm-controlled Hal and the real Hal inside struggling to fight back. And later the eldest Mason son has the weird experience of a fast-growing, half-alien baby sister joining the family, plus he has to deal with his alien spikes-influenced girlfriend, Maggie, falling for his younger brother. With unwavering loyalty to his family and to the 2nd Mass and with some badass alien-fighting skills, Hal has survived many close calls to make it to the “Falling Skies” series finale.

Needless to say, it’s been quite the journey for both Hal Mason and Drew Roy.

Roy visited HitFix’s offices to reflect back on five seasons of “Falling Skies” and to tease the impending series finale. For scoop on revelations in the final episode, what it was like to film those intense Hal vs. Pope scenes in “Non-Essential Personnel,” and which websites Roy visits to follow fan theories, check out the HitFix video interview below.

The “Falling Skies” series finale, titled “Reborn,” airs on on TNT on Sunday, Aug. 30 at 10 p.m. ET/PT.

An enthusiast of time travel stories, film scores, avocados and Charades, Emily Rome is an alumna of Loyola Marymount University and a native of beautiful Washington State. Emily’s writing has also appeared in the Los Angeles Times, Entertainment Weekly and The Hollywood Reporter. Follow her on Twitter @EmilyNRome.