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Season 1 - Aug. 24, 2001
Season 2 - Jun. 13, 2003
Season 3 - Jun. 11, 2004
Season 4 - Feb. 25, 2005
Season 5 - Jul. 29, 2005
Season 6 - Jan. 06, 2006
Season 7 - Jun. 06, 2006

The Grim Adventures of Billy and Mandy Season 6 Episode 5
HD
Overview:
Billy, Mandy and Grim visit Mighty Moe, an old man who has discovered the secret to add extra years to his lifespan: a good diet and exercise. Mighty Moe decides to publish his secret in a book, and Grim needs to stop him by offering junk food.