Sub Enchanted Evening

S1, E10: Mac must deal with a crisis of international proportions - with potentially devastating consequences - when a U.S. submarine in a covert operation off the coast of North Korea runs into trouble. Meanwhile, Mac considers running for election in the next presidential race, with Dickie McDonald advising what her campaign strategy should be, and her family - minus Rebecca - supportive of the decision. And Jayne Murray, in her new role of lobbyist, finds herself questioning what her future holds, on the first of a special two-part story.