Madam Secretary (2014– )
7 user

Thin Ice 

While the Secretary attends a summit intended to resolve territorial claims on the North Pole, an activist group detonates a bomb, and Russia is behind it. Henry helps a student through a hard decision.


Félix Enríquez Alcalá (as Felix Alcala)


Barbara Hall (created by), Moira Kirland | 1 more credit »

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Episode cast overview, first billed only:
Téa Leoni ... Elizabeth McCord
Tim Daly ... Henry McCord
Keith Carradine ... President Conrad Dalton
Patina Miller ... Daisy Grant
Geoffrey Arend ... Matt Mahoney
Erich Bergen ... Blake Moran
Sebastian Arcelus ... Jay Whitman
Kathrine Herzer ... Alison McCord (credit only)
Evan Roe ... Jason McCord
Wallis Currie-Wood ... Stephanie 'Stevie' McCord
Zeljko Ivanek ... Russell Jackson (credit only)
Sara Ramirez ... Kat Sandoval
Sam Underwood ... Andrew Hill
Tony Plana ... Admiral Ray Parker
Johanna Day ... Admiral Ellen Hill


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.

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Release Date:

29 April 2018 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

16:9 HD
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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 »

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User Reviews

Civilian and military nuclear have long been separate.
13 June 2018 | by albertrogersSee all my reviews

She is correct in supporting nuclear, and there is at TMI a reactor built _before_ th one that melted down, with a spotless record. In fact, that old design, despite its three weaknesses, has killed NOBODY, not even when assailed by Japan's worst earthquake on record AND followed by a tsunami that drowned on or two people near the reactor with no held from radiation and drowned the emergency power (diesel-electric) that was needed to prevent the heat of the quite evanescent fission product radioactivity from damaging the reactors. Note that the people who stayed and worked at the reactors suffered nothing but presumably sorrow at the loss of the machines they'd been looking after for so long. There were fatalities among the thousands that the panicked government evacuated from the area. None of them caused by radiation.

What about Chernobyl? -- Not the same reactor design, in fact a very inferior one.Loss of water coolant in Alvin Weinberg's Light Water designs, or for that matter Canada's Heavy water (D2O) versions, causes the nuclear reaction to fade and go out. The RBMK design uses graphite's carbon atoms to slow down the neutrons, and let them be caught by the uranium, but loss of the coolant water means that neutrons that it would otherwise capture, survive to increase the fission activity. A positive feedback like a howling microphone. Even so, of the heroic crew and emergency workers, the death roll was 28, which is kinda low for a "disaster" There were also thyroid cancers from the shortest lived radioactive iodine isotopes, of whom about 30 died, and that was again the fault of the Soviet central controllers, who refused to admit the breakdown, and did not administer the potassium iodide that prevents absorption of the radioactive stuff. As for the widely broadcast deadly bomb-making plutonium in the waste, about 15% of the energy I get from Dominion Power is from peaceful clean plutonium fission, and the wasteful part of nuclear waste is throwing the rest of it away in the "spent" fuel. Bomb making from nuclear waste's plutonium? Well for one thing, at 2500 tons a year there might be 25 tons of plutonium oxide. It isn't bomb grade, which requires over 90% pure isotope 239. The next isotop spontaneously emits neutrons, which even at bomb grade means a very complicated and precise "Fat Man" bomb. ORNL and LANL scientists say that a bomb "could be made" from reactor grade plutonium, which I do believe those clever guys could do. But any miscreant who is that clever knows that what the Chicago Pile and Hanford did is easier, so why mess with "spent" civilian fuel?

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