- Trey Parker (Eric Cartman / Stan Marsh (voice))
- Matt Stone (Kyle Broflovski / Kenny McCormick (voice))
- Mona Marshall (Sheila Broflovski (voice))
- Jennifer Howell (Bebe Stevens (voice))
South Park — S10E9
Episode: Mystery of the Urinal Deuce
Air Date: 2006-10-11
Runtime: 23 min
Overview
Cartman reveals who masterminded the attacks of 9/11, while Kyle and Stan search for the real truth; meanwhile Mr. Mackey just wants to know who dropped the deuce in the urinal.