let I start off by say I have never previously like any of the Doctor-Who series outside of the Tom Baker episode . the US try to do a new version of Doctor-Who year ago and it be awful . I do not expect this new attempt at bring Doctor-Who back to be any better , but from the very first episode be really impressed with not only the production value , but the character and story themselves . when so soon , they already change the doctor to a new actor only in the second series , I be again prepare for a let down , but I actually like this doctor better , and he seem to have a little bit of `` Tom Baker '' personality that come out too . I be really enjoy this second series set , when I come across the double episode story `` Army of Ghosts '' and `` Doomsday '' which be the two last episode on this set , but really a two-parter of the same story . these two episode , be the best doctor-who episode of all time , in my opinion , and remember , I be a Tom Baker fanatic . there be three reason I make this the most amazing Doctor-Who episode off all time , -lrb- to date -rrb- but I will not mention the first reason , because that would ruin the surprise for those that have not see the episode and give away something that be more enjoyable to find out when watch for the first time . the second reason would be the great production value , it stand up with any major production motion picture make for theater , and this be for only a television series ? wow ! the third reason be the emotional feeling I go through after watch this last episode on this set . I have never go through anything like that ever from watch Doctor-Who . I have to admit , I like Billie Piper as the Doctor 's companion , -lrb- and the only other companion I have like since Romana -rrb- but since she be mostly know prior as just a teen pop star -lrb- like the UK 's version of Britney Spears -rrb- I do not expect she act ability to do what she do in `` Doomsday '' the last episode in this second series set . I be very impressed . see that Series three -lrb- not yet available to I as of this review -rrb- have a new companion for the Doctor , I be again hessitant that I will like it , but will have to see . however , even if you be a die hard Tom Baker fan , I think you will find this second series of `` Doctor-Who the next generation '' to be one you will not be disappoint with and really will enjoy ! especially the last two episode on this set !!