S15, E11: It is the spookiest event in the calendar as 2017's Halloween special sees the return of spiders, witches, broomsticks and ghosts to the Strictly ballroom. If the celebrities thought the dance floor was scary before, they are in for an even bigger fright. Tess Daly and Claudia Winkleman present what promises to be a spine-tingling show, and the remaining eleven couples enter into the spirit of Halloween.