After an important meeting, Hannah reaches out to friends for advice, but has trouble reaching Marnie.
Elizabeth attends a summit in Montreal to resolve territorial claims on the North Pole; an activist group detonates a bomb; Elizabeth learns that Russia was involved in the bombing; Henry helps one of his students work through a difficult decision.
Tommy tries to help a young woman who intentionally gets arrested to buy time for her political asylum request to be approved; a reporter friend of Blake's asks her about the prison murder of Mayor Gray's former campaign donor.
Secretary of State McCord agrees to host a holiday party to persuade senators about a landmine treaty; Henry looks for evidence that the senate majority leader exchanged information with the Russians.
The 20th anniversary of the embassy bombing in Mali has emotions running high; Elizabeth must decide if sanctions should be lifted against the country deemed responsible; Henry tries to help Jason break up with Piper.