BBC EastEnders fans are buzzing with theories as they believe they've spotted a clue about the upcoming Christmas episodes.The festive season in Albert Square will see Denise (Diane Parish), Kathy (Gillian Taylforth), Linda (Kellie Bright), Sharon (Letitia Dean), Stacey (Lacey Turner) and Suki (Balvinder Sopal) dealing with a mysterious dead body, who is yet to be identified but is wearing amber cufflinks. Meanwhile, Sharon is seen in a blood-stained wedding dress.