show's fourth series (2008) during "Partners in Crime", Rose mysteriously begins to appear in the Doctor's life—first seen only by Donna, and later in silent video messages which the Doctor is oblivious to. In "Turn Left", when a "Time Beetle" creates an alternate universe in which Donna never meets the Doctor and the Doctor dies, Rose travels from her parallel world to this world, working alongside the organisation UNIT to send Donna back in time, and make Donna's younger self turn left at a junction and not right. Rose tells Donna to say two words to the Doctor; "Bad Wolf". The Doctor concludes this is a sign that the universe, and reality itself is under threat. Later, in the midst of Davros' (Julian Bleach) plot to obliterate existence, Rose unites with the Doctor and his companions Donna, Martha, Jack and Sarah Jane to make a stand against him and his army of Daleks. In the midst of the battle, a part-human Doctor is created and destroys the Daleks. The Doctor returns Rose to the parallel universe along with Jackie, and his part-human counterpart. Rose challenges the Doctor to say the words he did not say to her during their previous farewell. The Doctor does not answer, but his part-human counterpart whispers in her ear and Rose kisses him. The Doctor retreats, leaving Rose behind with his part-human counterpart. In the closing scenes of "The End of Time" (2010), just prior to his regeneration, the Doctor travels to Rose's housing estate in the first minutes of 2005. He speaks to her from the shadows, asking her what year it is. She tells him it is 1 January 2005. The Doctor promises her that she will have a really great year. Piper returned for the show's 50th-anniversary episode "The Day of the Doctor" (2013) as the interface of a sentient weapon of mass destruction known as 'the Moment'. The War Doctor (John Hurt) intends to end the raging Time War by using the Moment to destroy both the Daleks and the Time Lords. Using Rose's image, chosen for her future significance to the Doctor, the Moment attempts to persuade him to seek an alternative course of action by showing him how the decision will affect his future. Literature Rose is featured in the first twelve Doctor Who New Series Adventures novels, which expand on her characterisation. The first three of these novels—The