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.
Did You Know?
Thin Ice is also the name of an episode in Peter Capaldi's final season of Doctor Who. And the Madam Secretary episode came on April 29 2018 exactly a year after its Doctor Who namesake came on April 29 2017. See more