 Kate Thornton returned to present the main show on ITV, while Ben Shephard returned to present spin-off show "The Xtra Factor" on ITV2.This was both Thornton and Shephard's last series of "The X Factor", as Thornton announced her departure on 8 March 2007 and was replaced for the fourth series by Dermot O'Leary.Shephard also quit the show after being passed over for promotion to main presenter.