 The episode saw several major design changes for the series . " The Snowmen " is the debut of a redesigned TARDIS interior , as well as a new title sequence and variation of the theme tune . The new title sequence features a brief glimpse of the Doctor 's face , the first time since Survival , the final serial of the classic series in 1989 , that the Doctor 's face has been seen in the title sequence . Moffat had noticed that the TARDIS ' design was getting " progressively whimsical " and resembled more of a " magical place " rather than a machine . It was designed by series production designer Michael Pickwood , who stated that the new interior was also supposed to be " darker and moodier " and provide an easier access to the " gallery " of the ship when shooting . 
 The episode saw several major design changes for the series . " The Snowmen " <a href='drop_aux' title='1'><mark>is</mark></a>the debut of a redesigned TARDIS interior , as well as a new title sequence and variation of the theme tune . The new title sequence <a href='uninflect' title='2'><mark>features</mark></a> a brief glimpse of the Doctor <a href='null_genetive' title='3'><mark>'s</mark></a>face , the first time since Survival , the final serial of the classic series in 1989 , <a href='null_relcl' title='4'><mark>that</mark></a>the Doctor <a href='null_genetive' title='5'><mark>'s</mark></a>face <a href='been_done' title='6'><mark>has</mark></a> been seen in the title sequence . Moffat <a href='been_done' title='7'><mark>had</mark></a> noticed that the TARDIS ' design was getting " progressively whimsical " and resembled more of a " magical place " rather than a machine . It was designed by series production designer Michael Pickwood , <a href='null_relcl' title='8'><mark>who</mark></a>stated that the new interior was also supposed to be " darker and moodier " and provide an easier access to the " gallery " of the ship when shooting . 
The episode saw several major design changes fir da series . " The Snowmen " the debut of a redesigned TARDIS interior , as well as a new title sequence and variation of the theme tune . Tdanew title sequence feature a brief glimpse of thdaoctor  face , the first time since Survival , the final serial of the classic series in 1989 , the Doctor  face done been seen in thedatle sequence . Moffat done noticed that the TARDIS ' design was geting " progressively whimsical " and resembled more of a " magical place " rather den a machine . It was designed by series production designer Michael Pickwood , stated that the new interior was also supposed to be " darker and moodier " and provide an easier access to the daallery " of the sda when shootin .