While on the hunt for the victim of a kidnapping who is being held for ransom, the team uncover a connection to the Russian mob.
As a mission to capture a dangerous war criminal goes awry, Jason and the team refuse to abort. On a book tour, Clay's controversial father, Ash Spenser, arrives in town.
Sheldon tries to build a nuclear reactor. Dr Sturgis' colleague flirts with Meemaw. Georgia suffers a broken heart.
Callen must interrogate his father after he is found in a patient's hospital room during a radiation poisoning case; members of the team discuss their plans for Thanksgiving.
Elizabeth and Jay attempt to keep Serbia and Kosovo from falling apart. Henry experiences a unique encounter with Secretary of Defence.