 In addition to various verbal assaults on Walsh, Osbourne had thrown water over him live on air.Walsh's announcement was claimed by many to be a publicity stunt after he decided to return to the show the following Saturday night.Prior to the commencement of series four, "The Xtra Factor" host Ben Shephard left his post after reportedly being unhappy about not being given the presenting role on the main show, which instead went to Dermot O'Leary following the departure of original host Kate Thornton.