Maxwell Atom's animated series "The Grim Adventures of Billy & Mandy" debuted on the Cartoon Network on June 13, 2003, and would go on to run for 84 episodes over the course of six seasons.

current president of Adult Swim who was also the Senior Vice President of Development and Programming at Cartoon Network from 2006 to 2008. Atoms’ The Grim Adventures of Billy and Mandy ...