Richard Steven Horvitz

Richard Steven Horvitz, also known as Richard S. Horvitz, Richard Horvitz, or Richard Wood, (born July 29, 1966) is an American actor and voice actor best known for his work as the voice of the original Alpha 5 in Mighty Morphin Power Rangers, Power Rangers Zeo, and Power Rangers Turbo, as Raz in Psychonauts, Billy and his dad Harold in The Grim Adventures of Billy & Mandy, Grey Matter in Ben 10. Daggett in The Angry Beavers, the title character Zim in Invader Zim, Mouth in Kick Buttowski, and Orthopox in the Destroy All Humans! series.