Character mistake: Lois says to Quagmire, if you have any questions we'll be right across the street. They live next door obviously, not across the street.
Continuity mistake: Peter is sitting on the couch talking on the radio. You see the phone sitting on a table beside the couch. But when Peter picks up the phone to call Quagmire, the phone is right beside him, without him ever moving it from the table.
Factual error: You cannot get paternity test results back in one day. It takes 3 to 5 days or even weeks depending on the lab.
Answer: Lacey Chabert was the actress who originally voiced Meg in early episodes. She left of her own accord due to being in school and other acting work; Seth MacFarlane has stated there was no tension with her leaving, but it makes for a handy joke for the show.
Jon Sandys ★