Christopher Walker got his audio drama start as the villain Count Sonos and others for the Peabody-winning Kinetic City Supercrew radio show for the American Association for the Advancement of Science. More recently he has played characters for Bethesda Softworks games and Graphic Audio dramas, including Marvel Comics stories, where he voices Thanos, among others. He also narrates true crime stories, like the long-running Disappeared for Investigation Discovery, and shows on Discovery and the Smithsonian Channel. On-camera credits include Veep, House of Cards, and The Wire, the films Kringle Time and Last Strike, and the series Thespian on Amazon Prime.