Last night the curtain was raised on a spectacular themed week, as Strictly went to the musicals but now it is time for another couple to leave the competition. Tess Daly and Claudia Winkleman reveal which of the remaining incredible couples will get an extended run through to the Semi Finals next week - and whose run will be cut short.The public votes and judges' scores have been combined, and the two couples with the lowest scores will face each other in the dreaded dance-off - this is one encore that none of the couples want to face. Judges Len Goodman, Darcey Bussell, Bruno Tonioli and Craig Revel Horwood will decide which dancing duo will face their final curtain call and leave the competition for good.There will also be a very special and unmissable routine opening the show; Lens' Lens will be back to take a look at Saturday night's routines and Elaine Paige will be in the studio with a rendition of Don't Cry For Me Argentina from the musical Evita.