Doctor Who (series 1) Eccleston as the ninth incarnation of the Doctor, his only series in the role, accompanied by Billie Piper, as his first and main companion Rose Tyler, whom he plucks from obscurity on planet Earth, and to whom he grows increasingly attached. He also travels briefly with unruly boy-genius Adam Mitchell, played by Bruno Langley, and with 51st-century con man and former "Time Agent" Captain Jack Harkness, portrayed by John Barrowman. Episodes in the series form a loose story arc, based upon the recurring phrase "Bad Wolf", the significance of which goes unexplained until the two-part series finale. Alongside the "Bad
The Doctor (Doctor Who) without the shagging". He later stated that Rose was the Doctor's girlfriend, though it was never explicitly stated on screen. The Doctor's relationship with Rose intensifies after he regenerates into the Tenth Doctor. In "New Earth" (2006), Rose's body is temporarily inhabited by Cassandra, who kisses the Doctor romantically. This is one of the few scenes in the entire programme where the Doctor is kissed romantically by his companion. In "School Reunion" (2006), the arrival of the Doctor's previous companion Sarah Jane Smith and his reaction to seeing her again prompts jealousy and worry from Rose, and Sarah all but