if you think the return of the doctor be over with the regeneration of the Doctor , you have not see David Tennant -lrb- Harry Potter and the Goblet of Fire -rrb- as the tenth incarnation of the Timelord . just as load with emotion depth and darkness as Chris E 's Doc , but with a more traditional streak of classic quirky doctor trait . the doctor be suffer from post-regeneration stress on the x-ma special opener `` the CHRISTMAS INVASION . '' although the doctor be out-of-it for a major part of the special , Billie Piper and crew carry on superbly until the climax . the greatness of the season opener be no exception , nearly all of the season two episode be perfect ! the weakest episode be the New Earth -lrb- # 2 -rrb- which be the first to competely feature the new doctor . the cat-nurse hospital be true to the spirit of the series , but the best part be body swaping moment in which Rose become the posh Cassandra from season one , and so do the doctor -lrb- insanely funny , both performance -rrb- . the rest of the season feature some of the best work ever do in the show 30 + history , bar none ! other reason to buy this set : the doctor finally meet a werewolf the return of parallel universe the return of Peter Tyler The return of the Cyberman the return of K9 the return of Sarah Jane The return of mysterious reference thread -lrb- torchwood -rrb- the return of another long time villain -lrb- s -rrb- in a long overdue monster mash smackdown of epic proportion ! the School Reunion , which feature the Doctor 's reunion with fan-fav compainion Sarah Jane Smith & K9 , be a touching and tightly compose story that nicely set the tone forshadow thing to come , namely the amazing season finale . the writing be terrific in each episode , the reinvention of the Cybermen , set up more story that the fan themselve would have write . the Cybermen return for the finale along with some legendary uninvited party guest . just like last season , you 'll be ask yourself `` why have not someone do these story already , WOW ! '' bring on the 3 season ! Love & Monsters 4 ever !