2007 | 24 Episodes

Season 0 of The Grim Adventures of Billy and Mandy premiered on March 30, 2007.

2001 | 23 Episodes

Season 1 of The Grim Adventures of Billy and Mandy premiered on August 24, 2001.

2003 | 26 Episodes

Season 2 of The Grim Adventures of Billy and Mandy premiered on June 13, 2003.

2004 | 32 Episodes

Season 3 of The Grim Adventures of Billy and Mandy premiered on June 11, 2004.

2005 | 24 Episodes

Season 4 of The Grim Adventures of Billy and Mandy premiered on February 25, 2005.

2005 | 11 Episodes

Season 5 of The Grim Adventures of Billy and Mandy premiered on July 29, 2005.

2006 | 24 Episodes

Season 6 of The Grim Adventures of Billy and Mandy premiered on January 6, 2006.

2006 | 21 Episodes

Season 7 of The Grim Adventures of Billy and Mandy premiered on June 6, 2006.