Much of the story arc for '' Fringe '' involves an alternate universe that mostly mirrors the prime universe , but with numerous historical idiosyncrasies . A significant example element used is the effect of the September 11 attacks ; though this event also occurred in the alternate universe , the World Trade Center was untouched by the attacks , leaving the buildings as predominant landmarks in the alternate world 's skyline of " Manhatan " . The South Tower was used as the office of William Bell in several episodes
September 11 attacks
September 11 attacks
Fringe (TV series)