 The Doctor also wears a one @-@ off costume , Victorian @-@ themed , which Smith described as " a bit Artful Dodger meets the Doctor " . Moffat described the new outfit as a " progression " as the Doctor was in " a different phase of his life now " and felt more " grown @-@ up " and fatherlike . The costume was designed by Howard Burden for this episode . " The Snowmen " also contains several references to Sherlock Holmes , including the Doctor dressing up as him . Moffat is co @-@ creator of the BBC series Sherlock , for which Smith auditioned for the role of Doctor Watson before being cast as the Doctor . In addition , the incidental music during the scene bears a resemblance to the Sherlock theme . 
 The Doctor also <a href='uninflect' title='1'><mark>wears</mark></a> a one @-@ off costume , Victorian @-@ themed , which Smith described as " a bit Artful Dodger <a href='uninflect' title='2'><mark>meets</mark></a> the Doctor " . Moffat described the new outfit as a " progression " as the Doctor was in " a different phase of his life now " and felt more " grown @-@ up " and fatherlike . The costume was designed by Howard Burden for this episode . " The Snowmen " also <a href='uninflect' title='3'><mark>contains</mark></a> several references to Sherlock Holmes , including the Doctor dressing up as him . Moffat is co @-@ creator of the BBC series Sherlock , for which Smith auditioned for the role of Doctor Watson before being cast as the Doctor . In addition , the incidental music during the scene <a href='uninflect' title='4'><mark>bears</mark></a> a resemblance to the Sherlock theme . 
Da Doctor also wear a one @-@ offf costume , Victorian @-@ themed , which Smith described as " a bit Artful Dodger meet the Doctor " . Moffat described the new outfit as a " progression " as the Doctor was in " a diff phase of his life now " and felt more " grown @-@ up " and fatherlike . The costume was designed by Howard Burden for dis episode . " The Snowmen " also contain several references to Sherlock Holmes , including the Doctor dressing up as him . Moffat is co @-@ creator of tdaBBC series Sherlock , fa which Smith auditioned for the role of Doctor Watson before being cast as thdaoctor . In addition , the incidental music durin thedaene bear a resemblance to the darlock theme .