For Colin Baker's first season in 1984, Howell altered the theme slightly in pitch and this version continued to be used until Baker's 1985 story, "Revelation of the Daleks".
For Colin Baker's first season in 1984, however there was a problem in transferring the music so the theme was slightly lower in pitch. This version continued to be used until Baker's 1985 story, "Revelation of the Daleks".