  originally appeared on the parent series,  _"Doctor Who" (2005)_ (qv). Toshiko (Naoko Mori (I) (qv)) was the  government forensic pathologist called in to perform the autopsy on  the alien corpse in  _"Doctor Who" (2005) {Aliens of London (#1.4)}_ (qv). Jack  (John Barrowman (qv)) first appeared in  _"Doctor Who" (2005) {The Empty Child (#1.9)}_ (qv) and became one  of the Doctors companions. He was last seen in  _"Doctor Who" (2005) {The Parting of the Ways (#1.13)}_ (qv), in  which the character had experiences that would impact his role in  "Torchwood". Eve Myles (qv) played a similarly named character on  the parent series in the episode,  _"Doctor Who" (2005) {The Unquiet Dead (#1.3)}_ (qv); it has not yet  been established whether the two characters are related (unlike  Freema Agyeman (qv)s two appearances on "Doctor Who", first as a  supporting character in  _"Doctor Who" (2005) {Army of Ghosts (#2.12)}_ (qv) and later as a  series regular in series three; the two characters were explained to  be cousins).