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.

Allegiance тривав 1 сезон. Нових епізодів не заплановано.