Bitter Rivals: Iran and Saudi Arabia - Documentaries

The rivalry between Iran and Saudi Arabia "is primarily a competition about the direction of politics in the Mideast, and Iran wants to have a say in it," says Randa Slim of the Middle East Institute in Washington.

In this interview for the FRONTLINE documentary "Bitter Rivals: Iran and Saudi Arabia," Middle East scholar Vali Nasr talks about the history driving today's wars in the Middle East, whether these conflicts can be solved, and the parallels between ISIS and the nightwalkers from "Game of Thrones."

Saudi foreign minister Adel al-Jubeir makes a rare, on-camera reflection in the FRONTLINE series "Bitter Rivals: Iran and Saudi Arabia."