The fifth season of Without a Trace premiered September 24, 2006 on CBS and ended on May 10, 2007. There are 24 episodes in this season. This season includes the 100th episode. For the U.S. 2006–07 television season the fifth season of Without a Trace ranked 16th with an average of 14.7 million viewers and in the 18–49 demographic ranked 28th with a 4.1/11 Rating/Share.