"Doug's Secret of Success" is the twenty-seventh episode of Doug.
The lives of Doug and all the other students at Beebe Bluff Middle School become a frenzy when Lamar 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 and he realizes that the club isn't as great or as honest as he thought it was.
- Mr. Bone's profile on Vice Principal Search-Net says he was "Vice principal [of] Bluffington Elementary School for four seasons," in reference to how long the original Doug series ran.
- Mr. Bone returns to the show after missing for one season.