 The score to "Land of the Lost" was composed by Michael Giacchino, who recorded his score with an 88-piece ensemble of the Hollywood Studio Symphony and a 35-person choir.On May 10, it was also announced by Dave Mustaine on TheLiveLine that some music from Megadeth would appear in the film.Whether this would be music from the new record was not entirely clear, however during the phone message Mustaine stated that there was new music playing in the background of the message.