 Building upon the character 's surprise introduction in " Asylum of the Daleks " , " The Snowmen " introduces Clara as the Doctor 's new companion , though ultimately it would be a third version of her character that would travel with the Doctor starting with " The Bells of Saint John " . In addition to Clara , " The Snowmen " also introduces a redesigned TARDIS , revised title sequence and theme music , and sees changes to the Doctor 's costume . The special was produced in August 2012 , with location filming in Newport , Wales and Bristol . It received final ratings of 9 @.@ 87 million viewers in the UK , becoming the fourth most @-@ watched programme of Christmas Day . " The Snowmen " was met with mostly positive reviews from critics , most of whom received the introduction and character of Clara well . However , some felt that Grant and McKellen were underused as villains or the plot was slight because of the focus on characterisation . 
 Building upon the character <a href='null_genetive' title='1'><mark>'s</mark></a>surprise introduction in " Asylum of the Daleks " , " The Snowmen " <a href='uninflect' title='2'><mark>introduces</mark></a> Clara as the Doctor <a href='null_genetive' title='3'><mark>'s</mark></a>new companion , though ultimately it would be a third version of her character <a href='null_relcl' title='4'><mark>that</mark></a>would travel with the Doctor starting with " The Bells of Saint John " . In addition to Clara , " The Snowmen " also <a href='uninflect' title='5'><mark>introduces</mark></a> a redesigned TARDIS , revised title sequence and theme music , and <a href='uninflect' title='6'><mark>sees</mark></a> changes to the Doctor <a href='null_genetive' title='7'><mark>'s</mark></a>costume . The special was produced in August 2012 , with location filming in Newport , Wales and Bristol . It received final ratings of 9 @.@ 87 million viewers in the UK , becoming the fourth most @-@ watched programme of Christmas Day . " The Snowmen " was met with mostly positive reviews from critics , most of whom received the introduction and character of Clara well . However , some felt that Grant and McKellen <a href='uninflect' title='8'><mark>were</mark></a> underused as villains or the plot was slight because of the focus on characterisation . 
Building upon da character  surprise introduction in " Asylum of the Daleks " , " The Snowmen " introduce Clara as tdaDoctor  new companion , doe ultimately it would be a third version of her character would travel with the Doctor starting w " The Bells of Saint John " . In addition to Clara , " The Snowmen " also introduce a redesigned TARDIS , revised title sequence and theme music , and see changes to the Doctor  costume . Thdapecial was produced in August 2012 , with location filming in Newport , Wales and Bristol . It received final ratings of 9 @.@ 87 million viewers in the UK , becoming the fourth most @-@ watched programme of xmas Day . " Thedaowmen " was met with mostly positive reviews from critics , most of whom received the daroduction and character of Clara well . However , some felt dat Grant and McKellen was underused as villains or the plot was slight bc of the fdas on characterisation .