The first clip of the Simpsons-Family Guy crossover episode has been released at Comic Con in San Diego, and it shows how the Griffin’s and the Simpsons get along when the Griffins arrive in Springfield.

The premise episode appears to begin with the Griffin family stuck in Springfield. Peter warns his family not to drink the local water: "Everybody around here looks like they have hepatitis."

The episode is set to air on September 28th