Walker may be best known as the narrator of Investigation Discovery’s true crime fan-favorite Disappeared, with seven seasons and over 70 episodes (and a dramatic back-by popular demand comeback in response to “ID Addicts” calling via social media for his return as the show’s voice. He has done multiple series for ID, and can be heard on Discovery, Science Channel, MTV, and the Smithsonian Channel delivering empathetic, storyteller performances.

In the commercial arena, Walker has brought humor and drama to national and international brands.

Walker has performed characters for Bethesda Softworks’ Elder Scrolls game series and Fallout 3 and 4, and in Unreal 2: the Awakening, Deathgate and Callahan’s Crosstime Saloon for Legend Entertainment. He also plays a wide range of characters for Graphic Audio’s full cast audio drama productions, including Marvel Comics stories such as Who is Black Panther?