Most of the extending material served to expand the flashbacks: in the original 25-minute episode, Alan's story began with his arrival at Grandma's cottage, omitting the Parola Sands race and events immediately before and after.
The additional material was used to extend flashbacks: in the original 25-minute episode, Alan's story began at Grandma's cottage, omitting the Parola Sands race and events preceding and following it.