Donnie Fatso
| Episode Number | 9 |
|---|---|
| Season | 22 |
| Aired | 2010-12-12 |
| Overview | Jon Hamm will guest star as a Federal Bureau of Investigation agent as Homer goes undercover to infiltrate Fat Tony's mob. Joe Mantegna will return as Fat Tony, and also voice his cousin Fit Tony. |
| Runtime | 25 minutes |
| Absolute Number | 473 |
| Finale Type |