"Attack on Cloudbase" is one of only a few "Captain Scarlet" episodes to have its own score instead of using incidental music recycled from a track library. Series composer Barry Gray devised the score after Anderson decided that nothing in Century 21's musical archive suited the dark nature of the plot. Performed by a 14-member band, it was the penultimate score to be produced for "Captain Scarlet" and was recorded on 3 December 1967 in a four-hour studio session. The CD of the series soundtrack includes pieces from "Attack on Cloudbase" titled "Desert Symphony" and "The Mysterons Attack!"