'' Survivor : Marquesas '' is the fourth season of the American CBS competitive reality television series '' Survivor '' . The season filmed from November 12 , 2001 , through December 20 , 2001 , and premiered on February 28 , 2002 . Hosted by Jeff Probst , it consisted of the usual 39 days of gameplay with 16 competitors . The Marquesas Islands were initially selected as a backup location for '' Survivor '' . The original location , Jordan , was discounted as a result of the September 11 attacks and the political situation in the Middle East
September 11 attacks
September 11 attacks
Survivor: Marquesas