After taking the Underworld's "Bad Book" from Grim, Billy becomes possessed by an evil entity. Then, Billy steals Grim's scythe, and uses it to open a portal to summon Yog-Sothoth. In consequence, Mandy calls for Hoss Delgado to battle Billy. It is revealed that the portal can only be sealed by throwing the book into it. As Billy eats the book, Mandy throws Billy himself into the portal, restoring everything to normal. Instants later, a portal opens up and Billy comes out and says they didn't want him there.
| Title | The Grim Adventures of Billy and Mandy - Season 1 Episode 20 Big Trouble in Billy's Basement |
|---|---|
| Year | 2007 |
| Genre | Animation, Comedy, Kids |
| Country | United States of America |
| Studio | Cartoon Network |
| Cast | Greg Eagles, Richard Steven Horvitz, Grey DeLisle, Vanessa Marshall |
| Crew | Brian A. Miller (Executive Producer), Drew Neumann (Music), Gregory Hinde (Music), Jay Bastian (Executive Producer) |
| Alternative Titles | Die gruseligen Abenteuer von Billy & Mandy, Las macabras aventuras de Billy y Mandy, Grim & Evil, Las sombrías aventuras de Billy y Mandy, The Grim Adventures of Billy |
| Keyword | grim reaper, spin off |
| First Air Date | Aug 24, 2001 |
| Last Air date | Nov 09, 2007 |
| Season | 7 Season |
| Episode | 184 Episode |
| Runtime | 11:7 minutes |
| Quality | HD |
| IMDb: | 8.05/ 10 by 943.00 users |
| Popularity | 114.504 |
| Language | English |
Max 4K
Max Amazon Channel 4K
Apple TV HD
Amazon Video HD
Microsoft Store HD
SD
SD
SD
