And for good reason...it features a scene where one of the characters mows down runners in his car at the Boston Marathon. (The Associated Press report is here). The episode originally aired on March 17th.
By the way, if you see a Family Guy clip on the internet with a scene that looks like a bomb going off at the Boston Marathon, it's been edited by some sicko to make it look like this was a pre-planned conspiracy. There are already conspiracy nuts distributing it.
