Rose, the Doctor, and new companion Captain Jack Harkness (John Barrowman) come to understand the meaning of this phrase in "Bad Wolf" when they encounter an unstoppable army of Daleks on the space station Satellite 5, which first appeared in "The Long Game".

After defeating a werewolf in "Tooth and Claw", they are knighted by Queen Victoria (Pauline Collins), who banishes them as potential threats to the Empire whilst setting up the Torchwood Institute, which aims to track alien activity on Earth, including the Doctor's.

[7] Their relationship proves a source of tension once Mickey joins the pair in their travels, at the suggestion of the Doctor's former companion Sarah Jane Smith (Elisabeth Sladen) in "School Reunion".

[18] Later, in the midst of Davros' (Julian Bleach) plot to obliterate existence, Rose unites with the Doctor and his companions Donna, Martha, Jack and Sarah Jane to make a stand against him and his army of Daleks.

[27] The events of "Boom Town" are addressed in The Stealers of Dreams in which Jackie complains that Rose did not alert her to her recent visit to modern day Cardiff.

In order to arouse enough jealousy to defeat this creature, the Tenth Doctor feigns a romance with Rose's mother, and sets up Mickey with a group of actors who pose as beautiful Amazonian girlfriends.

[44] Head of Drama for BBC Wales Julie Gardner commented that the former pop star "fits the bill perfectly" as a "unique, dynamic partner for Christopher Eccleston".

[44] Whilst some fans —including a representative of the Doctor Who Appreciation Society —were enthusiastic about the announcement, others felt it was "publicity stunt" casting and questioned Piper's acting credentials.

"[54] Like her successor Martha, Rose is from London; Brett Mills from the University of East Anglia makes the assumption that this is because characters from the capital of the country are "relatable to all British people" because they are seen as "neutral".

[55] Rose is introduced alongside a supporting cast in the form of her boyfriend Mickey and mother Jackie which James Chapman cites as "evidence of Davies' attempt to create a social context for the companion".

Orthia contends that whilst working-class companions had featured previously in the show "none were unskilled workers nor chronically under- or unemployed like Rose, Jackie and Donna".

[57] Kay McFadden of The Seattle Times felt Rose to resemble "the Bridget Jones type of Englishwoman, albeit a few pegs down the socioeconomic scale" waiting to be awakened "not by some Mark Darcy ...  but by adventure incarnate.

[65] Lynette Porter, in her book Tarnished Heroes, Charming Villains and Modern Monsters: Science Fiction in Shades of Gray on 21st Century Television observed that Rose's role "humanises the Doctor and makes him less alien, not only to other characters, but to the audience".

Script editor Helen Raynor felt the episode gave Rose a chance to "again be the Doctor's equal" and "to finally match him with a gesture that is so noble, and strong, and heroic, and clever".

[68][citation needed] In an interview with SFX producer Phil Collinson stated that after the Doctor regenerates the "initial dynamic changes because [Rose] has to learn to trust him again".

[70] Collinson felt it was important to resolve any mistrust between the pair by the end of the Christmas Special, as the public had responded well to Rose and the Doctor's friendship previously.

[69] Davies had scripted dialogue in "The Christmas Invasion" explaining the newly regenerated Doctor's estuary English accent by stating he had imprinted on Rose and adopted her way of speaking.

"[73] Though Davies left the Doctor's response to Rose's declaration of love in "Doomsday" unstated, Gardner felt strongly that the character reciprocated her feelings.

"[74] Davies created the expectation of Rose's return in the fourth series by mentioning her in dialogue and featuring Piper in cameo appearances in "Partners in Crime", "The Poison Sky", and "Midnight".

[75] Piper stated she rewatched her earlier episodes to remember how the character spoke and acted as she felt she had "been playing posh birds" since she left the programme and by contrast "Rose is a bit of a chav".

[77] Davies characterised the reunion between Rose and the Doctor as "the biggest romance [the viewer] has ever seen" and joked that seminal films such as Gone with the Wind should have ended with a Dalek shooting the male lead.

[79] At one stage he considered giving an explanation that Rose's dimension hopping and the Dalek's meddling with reality had contaminated her with "voidstuff" and that she would die if she stayed in her original universe.

[87] After a preview of the first series, The Guardian's Owen Gibson described Rose as "newly empowered" and a "go-getting teen in the Buffy the Vampire Slayer mould.

She claims that the love story "simmers enough below the surface that adults, especially women who find Time-Lords sexy, watched the series for Rose's interplay with the Doctor".

[93] Harry Venning of The Stage commented that the eventual parting scene between Rose and the Doctor in "Doomsday" was "beautifully written and movingly played," with "not a dry eye in the universe".

[94] Burk and Smith singled out Piper's performance in the episode for special praise stating she "is astonishing at capturing the reality of someone whose world suddenly, finally collapses.

He thought that Billie Piper was "distinctly below par", citing her gaunt and malnourished appearance, new hairstyle, and slight lisp as reasons why her acting was not her finest.

He called Piper "a true and unending legend of Doctor Who" and stated that "her wise rendition of the Bad Wolf avatar made a passable stab at the stealing of the show".

[112][113] In 2012 Will Salmon of SFX magazine listed Rose's original exit as the greatest companion departure in the history of Doctor Who as he felt it "impossible not to be moved by the sudden severance of their relationship".

He notes that Piper's portrayal of Rose "firmly cemented her credentials as an actress" and cited the variety of roles she had taken on since leaving the show as proof that "as far as post-Who careers go, they don't get much healthier than Billie's.