Donnie Fatso The Simpsons : Season 22 Episode 9
TV-14 (DLSV) FOX 22m int(0)
Aired: December 12th, 2010 @ 8:00 PM EST on FOX
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.