Showtime released the first-look clip for the upcoming feature-length documentary The Longest War, which hails from Emmy(R)-winning director Greg Barker (Manhunt: The Inside Story of the Hunt for Bin Laden) and Alex Gansa and Howard Gordon, the executive producers of the Emmy(R) and Peabody-winning series Homeland. The Longest War premieres on Showtime on Sunday, April 19 at 10 p.m. ET/PT, immediately following the penultimate episode of Homeland .

As a companion piece to the final season of Homeland, which is set in contemporary Afghanistan where Claire Danes’ iconic CIA officer Carrie Mathison struggles to save a peace deal with the Taliban, The Longest War will unpack the CIA’s long and morally complicated history in the country from the 1980s to the present through compelling, first-hand accounts of CIA officers and other U.S. key officials.

Among the extraordinary subjects featured is former CIA targeter Lisa Maddox, a field officer in Afghanistan who joined the intelligence community after witnessing the 9/11 attack on the Pentagon and now questions the effectiveness of America’s longest war.