 Composer Murray Gold , arranger Ben Foster , and singer Yamit Mamo make cameo appearances as part of the ship 's band . Mamo , primarily a soul singer , was approached by Gold after his friends saw her performing , and she unconditionally accepted his offer . She performed the songs " My Angel Put the Devil in Me " and " The Stowaway " on the third series soundtrack . The latter was specifically composed for this episode and was recorded in September 2007 at AIR Studios in London . The song features everyone who was present in the studios during recording as backing vocals . " The Stowaway " continues the tradition of a Christmas song from " The Christmas Invasion " ( " Song for Ten " ) and " The Runaway Bride " ( " Love Don 't Roam " ) . The song was influenced by Irish folk music , and contrasts the upbeat " under deck " feeling with melancholy lyrics about unrequited love . The episode features a new version of the theme tune during its credits , comparable to Peter Howell 's version from the 1980s , which contains a new bass line , drums , and piano . 
