Ben Affleck in Africa Photo by: Max Culhane / ABC News / AP
Ben Affleck Travels to the Congo
His last small-screen appearance was a light-hearted affair – but this time Ben Affleck is tackling far more serious material.

The actor recently traveled to the Congo – where four million people have been killed in the decade-long conflict, according to the International Rescue Committee. And Thursday night, ABC's Nightline will air a special documentary on his eye-opening journey.

"Congo is in terrible shape," Affleck (who has traveled to the country three times in the last eight months) says in the segment. "What's going on here in the this country is a humanitarian disaster."

Cameras were there as the 35-year-old actor met conflict survivors, aid workers – and, yes, warlords.

Affleck presents the footage as a personal tale, and doesn't identify himself with any particular relief organization.

"I don't think people respond particularly well to being hectored, or being made to feel guilty, or being made to feel as though they're kind of callow or insensitive for the life they've been leading up until then," he told the Associated Press.

Ben Affleck in Africa Photo by: Max Culhane / ABC News / AP
Ben Affleck Travels to the Congo| Good Deeds, Ben Affleck