Past competitor Erin Andrews returns as the new co-host for season 18. R2D2 makes an appearance as Billy Dee Williams dances to a Star Wars medley opposite a pair of storm troopers and Ewoks.

One couple starts the show safe this week but the rest face a double elimination. Couples perform dances secretly chosen by the stars.

Robin Roberts joins the judges panel for this week's competition as couples perform dances inspired by the stars most memorable years. Injuries claim their first victim as Billy Dee Williams is unable to perform and is disqualified.

Julianne Hough returns to the show as a guest judge once again. In a change of pace the entire cast opens the show with a wild group dance. Then the contestants switch partners for the competition based on the home audience's Twitter votes. Scores are combined with last week's for next week's elimination. In a special surprise Derek shows off his first choreographed routine for the Macy's Stars of Dance.

The couples are back with their original partners and Donny Osmond joins the judges panel for Disney night. A few Disney characters find their way into some of the dances.

Redfoo joins the judges panel this week. Macys Stars of Dance return to perform Derek's choreography.

Ricky Martin joins the show for the always popular Latin night as a guest judge and performer. Injuries begin to take their toll especially among the ladies leading up to the team dance.

Mark Ballas opens the show with a vocal number. After performing their tradition dances, pairs of couples perform synchronized dances.

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