Matthew Dow Smith is principally a penciller of IDW's Doctor Who output. He has also occasionally inked and/or written issues of the two so-called "ongoing" Doctor Who titles.
For the Tenth Doctor ongoing comic, he pencilled the Fugitive and Final Sacrifice storylines, providing inks for some issues of both. He was also the writer, penciller and inker of The Big, Blue Box and the primary artist for Old Friend — stories in the 2010 annual.
For Eleventh Doctor IDW run, he is the announced artist for the fourth storyline, beginning in the summer of 2011.
He was also the writer and artist of Queen Amy and Clockwork World in Doctor Who Cardooo: Happy Birthday.
He later returned to do the artwork of Firelight in the Once Upon a Time Lord graphic novel with Christopher Jones.