Overview
- The celebration opened with a Derek Hough–choreographed routine featuring six Season 1 pros and a reimagined live version of the show’s theme.
- Former host Tom Bergeron returned to the ballroom as a guest judge for the anniversary episode.
- Judges awarded four perfect scores during the individual round as competitors performed routines inspired by past freestyles.
- A new relay twist paired current celebrities with former Mirrorball champions for two-point bonuses, with one couple holding immunity and receiving automatic bonus points.
- Combined judges’ scores and live viewer votes sent one couple home, setting a six-pair semifinal for Prince Night ahead of the three-hour finale on Nov. 25.