 In addition to the series ' main theme for Coulson , Bear McCreary composed several other themes that he used throughout the season : themes for Mike Peterson and Project : Centipede were introduced in " Pilot " ; a theme for the Agents as a team was introduced in " 0 @-@ 8 @-@ 4 " ; the Skye theme was introduced in " The Asset " ; a theme for both Fitz and Simmons together was introduced in " <unk> " ; a theme for Victoria Hand and The Hub , which served as the theme for ' Big S.H.I.E.L.D. ' , as opposed to Coulson 's ' little S.H.I.E.L.D. ' team , was introduced in " The Hub " . McCreary opted not to reprise any themes from the films during the season , notably composing his own themes for the Tesseract and Asgard , which he acknowledged had already appeared in several films . A soundtrack featuring music from the first and second seasons , was released by Marvel Music digitally on September 4 , 2015 , and will be released on CD in October 2015 . 
