NBC has shared the description for Allegiance episode 7, "Stranger in a Strange Land" - airing March 19th.
This high octane thriller revolves around the O'Connor family and their son, Alex, a decorated American war hero and CIA analyst who is a true patriot and loves his country and family. Unbeknownst to him, both of his parents and his sister are part of a dormant Russian sleeper cell that has just been reactivated. Once the parents get reluctantly pulled back in, the stakes rise as they are coerced into spying on their own son and turning him against his country. Based on the Israeli format, The Gordin Cell.