Gibbs and the team collaborate with an inspector for the International Atomic Energy Agency suffering from radiation poisoning, recreating his routine in an effort to figure out when the contamination took place.
Howard Stark's deadliest weapon has fallen into enemy hands, and only Agent Carter can recover it. But can she do so before her undercover mission is discovered by SSR Chief Dooley and Agent Thompson?
In the season finale, Peggy faces the full fury of Leviathan, as Howard Stark makes his return.
