Joe Marler is WHACKED on the head in intense finale challengeTo play this video you need to enable JavaScript in your browser.This video can not be playedJoe Marler is WHACKED on the head in intense finale challengeCloseWatch the full episode on BBC iPlayer.SectionNewsPublished7 NovemberShareclose panelShare pageCopy linkAbout sharingRelated topicsThe TraitorsFollow The Traitorsclose panelYou are now following The TraitorsUpdates from your News topics will appear in My News and in a collection on the News homepage.Read description