"The Grim Adventures of Billy & Mandy" One Crazy Summoner/Guess What's Coming to the Dinner (TV Episode 2005) - Richard Steven Horvitz as Billy, Billy's Dad, Wizard #1 - IMDb

"The Grim Adventures of Billy & Mandy" One Crazy Summoner/Guess What's Coming to the Dinner (TV Episode 2005) Poster

The Grim Adventures of Billy & Mandy (TV Series)

One Crazy Summoner/Guess What's Coming to the Dinner (2005)

Quotes

Mandy : Billy, you know that Rollington Academy is for...

Billy : Geniuses! Which I is one of them!

See also

Release Dates | Official Sites | Company Credits | Filming & Production | Technical Specs