The sub crisis escalates rapidly once the North Koreans learn that the disabled U.S. craft has drifted into their waters, and the Koreans immediately threaten war. Templeton urges that Mac not "back down," but she's more concerned about the sub's stranded crew, who are quickly running out of oxygen. Meanwhile, Sarah Templeton delivers a message from her husband to Jayne; and upstairs at the White House, Kate tries to calm Amy. She's baking cookies.