The Pocket Orchestra
Twenty-six composers are featured on stage during the course of the show , which features live performances from a cast of six actor/musicians who were Sebastian Bates , Emma Correlle , Karen Fisher-Pollard , Ella Smith , Paul Arden-Griffiths , Ian Harris and additionally has former "Doctor Who" star Sylvester McCoy as the host ( or Showman ) who guides the audience through the performance . 
<triplet> Doctor Who <subj> Sylvester McCoy <obj> cast member