Doo Where Are You!" theme was not the original  theme composed for this series; musical director Ted Nichols (qv)  had originally composed an instrumental theme for the show, which  alternates with the the more familiar  David Mook (qv)/Ben Raleigh (qv) theme (which was recorded three  days before the premiere of the show on 13 September 1969) on the  original broadcast prints of the show. Nichols incorporated his tune  as the main recurring theme for the incidental music score, and a  truncated version of it underscores all the episode title cards for  both this series and _"New Scooby