Madam Secretary

Season 4, Episode 19

Episode Title: Thin Ice

Air Date: 2018-04-29

Overview:

Elizabeth is attending a summit in Montreal to resolve territorial claims of the North Pole when an activist group detonates a bomb and she can’t locate Jason and Piper. Also, things take a turn for the worse when Elizabeth learns that Russia was involved in the bombing, and Henry helps one of his students work through a difficult decision.