Bitter Rivals: Iran and Saudi Arabia

Part 1 - FRONTLINE traces how a 40-year rivalry between Iran and Saudi Arabia has fueled sectarian extremism across the Middle East for political gain. Correspondent Martin Smith travels to seven countries, including Iran, Saudi Arabia, Syria, Iraq and Yemen to examine how the power struggle has rippled across the region.

Part 2 - FRONTLINE traces how a 40-year rivalry between Iran and Saudi Arabia has fueled sectarian extremism across the Middle East for political gain. Correspondent Martin Smith travels to seven countries, including Iran, Saudi Arabia, Syria, Iraq and Yemen to examine how the power struggle has rippled across the region.

Part 3 - FRONTLINE traces how a 40-year rivalry between Iran and Saudi Arabia has fueled sectarian extremism across the Middle East for political gain. Correspondent Martin Smith travels to seven countries, including Iran, Saudi Arabia, Syria, Iraq and Yemen to examine how the power struggle has rippled across the region.