| "Mystery of the Urinal Deuce" | |
|---|---|
| South Park episode | |
| Episode no. | Season 10 Episode 9 |
| Directed by | Trey Parker |
| Written by | Trey Parker |
| Production code | 1009 |
| Original air date | October 11, 2006 |
| Guest appearance | |
| Maddie Taylor as George W. Bush[a] | |
"Mystery of the Urinal Deuce" is the ninth episode in the tenth season of the American animated television series South Park. The 148th episode of the series overall, it first aired on Comedy Central in the United States on October 11, 2006. The episode focuses on the 9/11 conspiracy theories, and was written by series co-creator Trey Parker. In the episode, Mr. Mackey is determined to find out who defecated in the urinal, while Cartman manages to link it to 9/11. This causes Stan and Kyle to find the truth behind this terrible event in history.
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