"Doug's Secret of Success" is the 27th episode of Doug in the Disney era. It first aired on September 6, 1997, on ABC.
The lives of Doug and all the other students at Beebe Bluff Middle School become a frenzy when Bone returns and becomes the middle school's new vice principal. He soon starts throwing Roger into detention and making new school rules. Also, eighth graders invite Doug to join a secret club of the future powerful men of the universe. But in order to be worthy to join, Doug must prove he can be a successful person and it's cutting himself out of monster hunting with Skeeter.
- Mr. Bone makes his return in this episode.