On part two of the Stewie kills Lois episodes, when the FBI or CIA, whatever it is, goes through the door, it is Stan Smith and Deputy Bullock from American Dad, another show from the creator of Family Guy. Another one is on the episode where Peter and Brian go back in time to party, at the end when they think everything is right, the alien, Roger, from American Dad, comes in and says "Who ate all the pecan sandies?" which is what he says on the American Dad pilot episode.Also in the episode "Petergeist" before the tv goes all weird and ghosty it shows what is on the tv and you see and American flag waving and that clip is from the opening sequence to American Dad