 Her performance won the Best Actress prize in the 2005 BAFTA Cymru awards, defeating expected favourite Billie Piper (who had been nominated for her role as Rose Tyler in "Doctor Who").Griffin herself first became associated with "Doctor Who" by frequently being used as a stand-in for unavailable actors during read-throughs for other episodes.This led to her casting in the episodes "Rise of the Cybermen" and "The Age of Steel", during production of which she continued to impress the production team to the degree that the script was rewritten so that her character survived for longer than originally planned.