Series 3 ( Doctor Who ) Series 3 of " Doctor Who " , which ran mostly during 2007 , saw David Tennant joined by Freema Agyeman as Martha Jones for most of the series ' episodes . Predominated by a story arc that dealt with the mystery of Harold Saxon , a British politician who turned out to be , the series also involved the return of Jack Harkness . Because Jack ' s involvement in the series was narratively important to " Torchwood " , the series had a demonstrable impact on series 1 and series 2 of that sister programme . Since the series 3 commission also included the 2006 Christmas Special , the series could also be said to have started the BBC Wales irregular tradition of having a " one - off " companion . The success of Catherine Tate ' s Donna Noble would not only cause the production team to successfully court her to return as a regular companion for the next series , it also showed the audience could accept , and apparently enjoy , a single - episode companion . Consequently series 3 paved the way for the inclusion of any number of famous and busy guest stars to be companions in single episodes thereafter . A trailer for the series was released . Highlights . Series 3 introduced a slightly tweaked logo , first shown in " The Runaway Bride " , which remained in place throughout the remainder of David Tennant ' s tenure as the Doctor . This brought the show ' s title sequence more in line with it ' s merchandise and promotional material , as it ' s official logo had been this version since 2005 . A revamped version of the theme tune was also offered up by Murray Gold . A new costume was added to the Doctor ' s wardrobe . From this series forward , he had a blue suit of the same basic design as his brown one . Though at first just a way to give him a Pertwee - esque variation from story to story , it would actually become narratively important to telling the story of series 4 ' s " Journey ' s End " , where another version of the Tenth Doctor appeared . Equally important to the future were the series two main story arcs . The storyline with was crucial to understanding the way in which the Tenth Doctor ' s regeneration in the later " End of Time " . Likewise the reasons for Martha Jones ' departure at the end of the story were reflected in each of her later appearances in both " Doctor Who " and " Torchwood " . Crucial to the development of the programme was the series ' Doctor - lite episode , " Blink " . It introduced BBC Wales first new enemy that could be said to genuinely rival the Dalek s ' enduring popularity : The Weeping Angel s . They would become one of the Eleventh Doctor ' s main rivals . And series 3 was also important for including a direct adaptation of a story that had been originally written for another medium . Though the audios " Jubilee " and " Spare Parts " had been the very loose bases for two previous stories , " Human Nature " was the first , unmistakably direct adaptation of an existing story in franchise story . It would not be the only time when the production office directly adapted a pre - existing work . The series also inspired the first original animation in franchise history , a 45 minute episode stripped across each episode of " Totally Doctor Who " ' s second season . Though nominally a part of the " TDW " commission , " The Infinite Quest " nevertheless gave Martha and the Doctor a 14th televised adventure that could be followed each week alongside the live - action programme . Series 3 also included the first ( and so far only ) three part story in the new series . Adaptations and merchandising . Home media . DVD . All episodes of series 3 were released in 2007 in both individual volumes and in boxset form by 2 | Entertain for Region 2 , in 2006 by Warner Home Video for Region 1 , and by Columbia Tristar Home Entertainment ( under the Sony Pictures Home Entertainment imprint ) in other territories . In 2014 the series was re - released on DVD in the US , split into two volumes labelled " Part One " and " Part Two " respectively , mimicking the home video release of Series 6 and 7 . This release is missing much of the bonus content seen on the previous box set . Re - packaged versions of the complete series were also made available . Blu - ray . Series 3 was included in the " Doctor Who : Complete Series 1 - 7 " Bluray boxset , released November 4th , 2013 in the UK and on November 5th , 2013 in the US . Awards . This series won a 2008 in the category of " Best International Series " , following its transmission on the American Sci Fi Channel .