Clay Martin Croker (January 10, 1962 – September 17, 2016, better known as C. Martin Croker) was an American animator and voice actor on various Adult Swim series. He was best known for voicing the Space Ghost characters Zorak and Moltar on Space Ghost Coast to Coast. C Martin Croker also returned to voice Moltar from 1997 to 1999 on the Cartoon Network programming block Toonami, later being replaced by TOM, voiced by Sonny Strait who led the block from then on.