She's one of the few crew members to start on Torchwood, go to SJA and then arrive at Doctor Who last. She worked on the first series of both of the spinoffs before coming into Doctor Who because of the necessity of double banking the production of Blink. She returned for a run of several episodes in series 4 and the 2009 Specials. She left Doctor Who, however, at the close of the Russell T Davies era.
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