Alexander Skarsgard talks 'The Kill Team,' Meryl Streep and his famous father

Alexander Skarsgard is starring in the new film "The Kill Team."

Alexander Skarsgård is starring in the new film "The Kill Team," which offers a fictionalized look at a real-life whistleblower story about a stunning turn of events involving American soldiers in Afghanistan.

Skarsgård recently stopped by the ABC News studios to talk about his role in the film as a platoon leader.

"It was a fascinating role," Skarsgård told ABC News. "It was very disturbing. It's very dark. It's not the archetypal villain. There was a great complexity to the character that I was excited to work on and explore."

Download the all new "Popcorn With Peter Travers" podcasts on Apple Podcasts, Spotify, Tunein, Google Play Music and Stitcher.

The film, directed by Dan Krauss, who wrote and directed a 2013 documentary of the same name, follows what happened when whistleblowers attempted to expose the murders of Afghan civilians by U.S. soldiers. It's Skarsgård's character, Sgt. Deeks, who leads his team down the wrong path.

"He obviously doesn't think that he's doing something horrific," Skarsgård said on "Popcorn with Peter Travers." "He really believes in it."

Skarsgård, 43, said the film shows just how easy it is to surrender your morality to authority.

"In the beginning, they feel like they're a part of a unit and the unit has it's own morality and it's own moral compass. And the leader of that unit is Deeks (Skarsgård). So all they have to do is just follow blindly."

He added, "This also feels quite timely because it's about a whistleblower which is quite topical right now."