Doctor Who (series 4) Astrid Peth, who died during the events of the episode. The companions in the regular series had all been in the lead companion role previously: the primary role of Donna Noble, who was introduced in "The Runaway Bride", was played by Catherine Tate for all thirteen episodes. Her return was announced by the BBC on 3 July 2007. Freema Agyeman, who portrayed the Doctor's companion Martha Jones in series three, returned for "The Sontaran Stratagem", "The Poison Sky", "The Doctor's Daughter", "The Stolen Earth" and "Journey's End". Billie Piper, who played Rose Tyler from the first episode of the new
Doctor Who spin-offs the comic writers had the opportunity to depict the Eighth Doctor's regeneration into the Ninth Doctor, but declined when Davies refused to allow them to give the Ninth Doctor a companion prior to Rose Tyler. The publishers of "Doctor Who Magazine" have also produced many the spin-off publications including "Doctor Who Adventures", "Doctor Who Classic Comics" and many other special publications and annuals which include comics. "Doctor Who Magazine", which is now owned by Panini Comics continues to produce new comic strip adventures. Panini has reprinted many of the early DWM strips in trade paperback format. At the 2007 San