In the episode commentary of the episode The Blood Line, Russell T. Davies talked about a storyline which was an early version of the Miracle Day storyline that was for thirteen episodes of the season which was devised by Russell T. Davies, Jane Esperson and Chris Chibnall. (who wrote episodes for the first two series.) In this storyline, many of the episodes would have been kept the same but the episode "Immortal Sins" would have killed off the character of Andy Davidson. He would have become a Category One. This may have also been in a different place in the thirteen episode version. The final two episodes would have been "The Blood Line" up until the thirteenth episode in where the Blessing would have started to kill people in Shanghai and Buenos Aires, resulting in the Blessing sites having to be blown up or otherwise destroyed.