For every agent in the United States Secret Service, the most high-profile security assignment is to protect the president of the United States. In National Geographic's documentary series Chain of Command: The Secret Service viewers will be immersed in the high-stakes world of a law enforcement agency that very few people know much about. The second season of the Chain of Command franchise will premiere in early 2019 after National Geographic camera teams embed with the elite agency over the course of a year.

Season 1 Episode 3 - Part 3, ‘Shoulder to Shoulder’

American officials search for dangerous migrants in Colombia; back home, husband and wife Marines prepare for deployment to Afghanistan. Air Date : 22nd-Jan-2018

Season 1 Episode 1 - Part 1, ‘By, With & Through’

Chain of Command begins with a look at the efforts of U.S. and Iraqi forces to regain control of eastern Mosul — the front lines of the war on extremism. Air Date : 15th-Jan-2018  Read More

Season 1 Episode 2 - Part 2, ‘Perception and Reality’

The battle for western Mosul begins, a unit deploys for Afghanistan and the war against extremism stretches to the Caribbean island of Trinidad. Air Date : 15th-Jan-2018  Read More

Season 1 Episode 3 - Part 3, ‘Shoulder to Shoulder’

American officials search for dangerous migrants in Colombia; back home, husband and wife Marines prepare for deployment to Afghanistan. Air Date : 22nd-Jan-2018  Read More

Season 1 Episode 4 - Part 4, ‘The End of the Beginning'

While coalition forces in Iraq gain ground in Mosul, in Trinidad and Tobago, local Muslim leaders are the tip of the spear in the fight against ISIS. Air Date : 29th-Jan-2018  Read More

Season 1 Episode 5 - Part 5, 'Generations'

U.S. Marines advise and assist the Afghan army against the Taliban, and one officer watches on Skype as his son is born back home. Air Date : 5th-Feb-2018  Read More

Season 1 Episode 6 - Part 6, 'Crossroads'

Marines continue to work with local forces in Afghanistan, while the U.S. also looks to curb extremism across Africa as well as the jungles of Panama. Air Date : 12th-Feb-2018  Read More

Season 1 Episode 7 - War Without Borders

A look at the war against violent extremism in Afghanistan and Africa. Air Date : 19th-Feb-2018  Read More

Season 1 Episode 8 - "Why we Fight"

The war on terror looks different across the world. At Camp Shorab in Afghanistan, a group of Marines prepare to return home, but are surrounded by reminders of the dangers still haunting the country. Meanwhile in Niger, U.S. Army Special Forces work with local forces to combat extremism, but tragedy strikes when four Americans are killed in an attack. As the losses are mourned, the war against violent extremism continues. Air Date : 25th-Feb-2018  Read More