Säsongen 1 av Allegiance startade på NBC på jeudi 5 février 2015, Detta är den pågående säsongen, den har bara ett avsnitt för tillfället..
Alex O'Connor, a young idealistic CIA analyst specializing in Russian affairs, learns a shocking secret and his close-knit, affluent family is about to be split apart when it's revealed that his parents, Mark and Katya, are covert Russian spies deactivated decades ago. But today the Kremlin has re-enlisted them into service as they plan a terrorist operation inside the U.S. border that will bring America to its knees.