S1, EP8 "Part 8: Why We Fight"
U.S. Marines prepare to return home from Afghanistan, but they are still surrounded by reminders of the dangers haunting the country.
S1, EP7 "Part 7: War Without Borders"
The war against violent extremism on an aircraft carrier, and in Afghanistan and Africa.
S1, EP6 "Part 6: Crossroads"
The United States continues its global war against extremism in Afghanistan, Africa and Panama.
S1, EP5 "Part 5: Generations"
In Afghanistan, the Marines work with local fighters as they battle the Taliban.
S1, EP4 "The End of the Beginning"
As the battle of Mosul nears an end, fighting extremism in Trinidad and Tobago begins.
S1, EP3 "Shoulder to Shoulder"
The war on extremism continues across the globe -- from Iraq to Colombia to Afghanistan.
S1, EP2 "Perception and Reality"
As the war on extremism continues globally, the battle for western Mosul begins in Iraq.
S1, EP1 "By, With & Through"
An unprecedented look deep inside the war against violent extremism.