as everyone have already say in they review , David Tennant do indeed step in Christopher Ecclestones considerably talent shoe with ease . he grace he doctor with the same amount of energy and charisma as the previous doctor , but also manage to imbue he with a more natural and engaging warmth . the second series may lack some of the excitement and ` new-ness ' of the first , but thanks largely to it be great cast it manage to steer ahead strongly , drive by broader plot and lead to a darker end . but , for I , it be Rose who be the real star of both . Billie Piper , ex-teen singing pop sensation , just bristle Rose to real life . I can see this every girl on any street in London or Cardiff , full of idea , energy , wit , fear , strength , joy ... just watch she play off the doctor ' eccentricity be a reminder to how we would all like to behave if ever confront with a Time Lord ! the last two episode be up with the best , and unlike a previous reviewer , I disagree with the final episode be a let down . my judgement ? no thirty four year old man should ever cry in front of he miss and kid because of a tv show , but the fact that I do be all the proof I need !