Back to the Pilot " is the fifth episode of the tenth season of the animated comedy series '' Family Guy '' . It originally aired on Fox in the United States on November 13 , 2011 . In " Back to the Pilot " , two of the show 's main characters , baby genius Stewie and anthropomorphic dog Brian , both voiced by series creator Seth MacFarlane , use a time machine to travel back in time to the first episode of the series , " Death Has a Shadow " . Trouble ensues however , when Brian tells his former self about the September 11 attacks , causing the present to be dramatically changed , and ultimately resulting in a second civil war . The two must then prevent themselves from going back to the past in the first place , but soon realize that it will be much more difficult than they had originally thought
September 11 attacks
September 11 attacks
Back to the Pilot