Production of the new version of the opening episode took place in what was to have been a three-week break for the cast between production blocks. Gina McKee was initially very concerned about having her character's early life story changed when she had already based elements of her later performance on the previously-established version. Eccleston was also unhappy about the sudden changes. However, McKee felt that the new version of episode one eventually made for a much stronger opening to the story.