High Quality Content by WIKIPEDIA articles! The sixth season of the television series Buffy the Vampire Slayer premiered on October 2, 2001 with a two-hour premiere on UPN and concluded its 22-episode season with a two-hour finale on May 21, 2002. It maintained its previous timeslot, airing Tuesdays at 8:00 pm ET. This season marked the series` network change from The WB Television Network to UPN.