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 in Australia and with Russell T. Davies as producer, the ABC responded by scheduling the series in the prime-time 7:30pm Saturday slot. Following the UK broadcast by less than two months, Series 1 of the new "Doctor Who" premiered in Australia with the first episode, "Rose", on 21 May 2005, going on to win its timeslot in four out of five capital cities. Series 1 of "Doctor Who" also saw the inception of the "Doctor Who" Christmas Special. The concept of a Christmas Special episode derived of an otherwise ongoing series has been commonplace in UK television for decades. However, the classic