Elizabeth (Tea Leoni) has to handle the crisis in Venezuela and problems at home in the upcoming episode 7, titled "Tectonic Shift," of the third season of the American political drama "Madam Secretary."

A devastating earthquake leaves Venezuela in shambles. The country's President and his immediate successors end up dead. Elizabeth tries to do everything in order to stop a power grab by the late president's son from happening. At the same time, the US Secretary has to make sure that the international aid team that he arrested will be released.

Elizabeth's brother, Will (Eric Stoltz), on the other hand, is having a hard time choosing between family and duty. He has to choose whether to save his marriage by settling down or work at Walter Reed Medical Center or flying to Venezuela to help in the relief effort.

The promo trailer for the upcoming "Madam Secretary" episode, "Tectonic Shift," shows the humanitarian crisis when the American aid workers are captured by the Venezuelan rebels right after they landed on the earthquake-stricken country. Then, Will talks to his sister, Elizabeth, and brother-in-law, Henry (Tim Daly), about his plans to bring his team in the country to assist the relief operations.

Despite Elizabeth's warning about the humanitarian crisis in Venezuela, it seems like her brother decides to push through with his plan, which makes her even more worried about the entire situation. However, Henry assures his wife that Will knows what is at stake.

Meanwhile, the previous episode, titled "The Statement," saw Elizabeth discovering that the terrorist bombing at a coffee shop in Illinois was funded by someone who has ties with the Saudi government. One of her staff members, Matt (Geoffrey Arend), was publicly harassed because of his religion. He declined to issue a statement to respond to accusations that the bomber is connected to him.

"Madam Secretary" season 3 airs Sundays at 9 p.m. on CBS.