Emmerdale fans might be in for a shock this Christmas, according to star Lisa Riley. Riley, who joined the soap as Mandy Dingle in 1995, told Leeds Live that she'd recently filmed scenes for the upcoming festive episode. “The Christmas Day episode – when I read it, my jaw fell," said the actor. "When we shot it, my jaw fell.Related: Exclusive: Emmerdale's Michael Parr shares verdict on Ross and Serena's future“It is so true. I played it as Mandy (when finding out).