As we grow nearer to the release of Halo: Nightfall this fall (and the eventual release of Halo 5: Guardians), we’re starting to learn more about the mysterious new character featured in the key art. Agent Locke’s role in the upcoming miniseries has been cast and we have new details about the actor and the character.

Mike Colter (pictured above as Agent Locke) has been in a number of television programs, including The Good Wife, The Following, and American Horror Story: Coven. He’s also been in films such as Zero Dark Thirty and Million Dollar Baby.

Agent Locke, who we see unmasked for the first time, is with the Office of Naval Intelligence (ONI). His team is called in to investigate terrorists on a human colony. There, an artifact touches off the events of Nightfall. The series will be produced by Ridley Scott and directed by Sergio Mimica-Gezzan (Battlestar Galactica, Heroes).

For more on Halo 5: Guardians and this fall’s Xbox One Halo: The Master Chief Collection, check out our coverage from E3.