“We the People” – A recent study funded by the Department of Homeland Security listed domestic right-wing groups as two of the top three greatest terrorist threats in America. Host Gianna Toboni investigates these so-called patriots, training and taking up arms along the border. “Countdown to Extinction” – Correspondent Isobel Yeung visits the Mozambique Channel and the Gulf of Mexico to get an idea of how much we've overfished our oceans, and what we can now do to reverse that trend.

The future of food and genetically modified organisms. India's shortage of clean water.

Anti-gay leaders teach intolerance to Uganda's youth. The illegal market for kidneys in Bangladesh.

Ben Anderson returns to Helmand, the country'smost violent province, to investigate the security situation in Afghanistan as American involvement winds down. Vikram Gandhi goes to Paris to gauge the causes of the growing hate in the City of Lights.

The increasingly strained relationship between Russia and NATO is examined in the Season 3 finale, which includes remarks by U.S. president Barack Obama and vice president Joe Biden.

Drug trafficking in Africa. Indian women who are paid to carry babies for wealthy foreigners.

The future of recreational drugs. Sex-change surgeries in Iran.

Thomas Morton reports on the fallout from anti-immigration legislation in Alabama. Vikram Gandhi visits Haiti to examine what happened to billions of dollars in relief and reconstruction aid following the 2010 earthquake.

An investigation of sexual assault on college campuses and why schools try to keep it off the record includes remarks by Sens. Kirsten Gillibrand (D-N.Y.) and Claire McCaskill (D-Mo.). Also: a report on the Ebola outbreak in Africa.

Suroosh Alvi travels to Saudi Arabia to see how America's staunchest Arab ally is defending itself - and how it may be fanning the flames of global militancy. Gianna Toboni travels to Europe to meet some of the young men drawn to ISIS's call, and visits with American Navy strike pilots working to roll back the Islamic State's gains.

“To Serve and Protect” – Thomas Morton reports from Ferguson, Mo., in the aftermath of the fatal shooting of Michael Brown, and interviews journalist Radley Balko about the militarization of police in the U.S.. “Coming to America” – Suroosh Alvi visits El Salvador to observe the reasons behind mass migration north, and chronicles a journey through Central America on top of trains that leads to the U.S.

Gianna Toboni investigates who's behind the looting of antiquities in the Middle East in the aftermath of the Arab Spring. Thomas Morton reports on the popularity of Western white males in China.

The palm oil industry in Indonesia and the search for new antibiotics.

A report on climate change that features a visit to Antarctica to observe melting glaciers and a report on rising sea levels in Bangladesh. Then an interview with Vice President Joe Biden.