Neal McDonough (Band of Brothers, Justified, Captain America: The First Avenger) has joined the cast of ARROW as a series regular for season four.

McDonough will play the DC Comics character Damien Darhk.

Damien Darhk is a mysterious and sophisticated villain, and an adversary of the late Ra’s Al Ghul. Now the leader of his own clandestine group, this cunning foe will prove to be one of the Arrow’s greatest challenges.

Returning for its fourth season Wednesday, October 7, at 8/7c on The CW, Arrow stars Stephen Amell, Katie Cassidy, David Ramsey, Willa Holland, Emily Bett Rickards, with John Barrowman and Paul Blackthorne..