The Parting of the Ways
Many fans and critics noticed similarities between Clara and Billie Piper's Rose Tyler. Clara helps the Doctor recover at a dark point in his life, as Rose does during a much darker time; both companions lose a parent; each has a close relationship with the Doctor, who sees part of their childhood. The Doctor does the same thing to Clara in "The Time of the Doctor" (2013) as he does to Rose in "The Parting of the Ways" (2005) by sending her back home to keep her safe.