The execution of a former mafioso in the witness-protection programme leads the agents to a retired mob boss, an unethical US Marshal, and a jealous widow. Elsewhere, Lisbon receives a surprise gift on her birthday.
Gibbs and Ducky see an antique war stick on television, and it could be the missing murder weapon to a 16-year-old cold case.
The hijacking of an illicit shipment of prescription painkillers draws Raylan into an investigation that points to the return of Crowder family henchman Dewey Crowe.
Archer invites a group of stargazers aboard not realising that his Suliban nemesis, Silik, is among them, and the captain soon realises that Silik has a pernicious plan to change the course of history.
A comparison-shopping widow brings a feisty Mitzi Huntley back to Nate and David with yet another offer from Kroehner. Ruth's estranged sister arrives for an unexpected visit.