The six male contestants are introduced. Penn, Cristian, and Mario perform the Cha-Cha. Jason, Adam, and Steve perform the Foxtrot. Mario receives the highest score.
The six women perform for the first time. Shannon, Marissa, and Marlee perform the Cha Cha. Monica, Priscilla, and Kristi perform the Foxtrot. Kristi receives the highest score.
All twelve contestants perform their second dances before the first elimination. Steve, Monica, Priscilla, Jason, Adam, and Kristi perform the Mambo. Cristian, Penn, Shannon, Marissa, Marlee, and Mario perform the Quick Step. Kristi receives the highest score and Monica receives the lowest score.
The Jonas Brothers perform. Macy's Stars of Dance returns with a performance choreographed by Jacques Heim of the Diavolo Dance Theatre and Cirque du Soleil. Penn Gillette and dance partner Kym Johnson are the first couple eliminated. Monica Seles and dance partner Jonathan Roberts are the second couple eliminated.
A recap of all of the dances thus far leading up to the episode that will eliminate the first two couples.
Steve, Adam, Priscilla, Kristi, and Mario perform the Tango. Marlee, Cristian, Shannon, Marissa, and Jason perform the Jive. Kristi receives the highest score while Marissa receives the lowest score.
The judges have Steve Guttenberg dance his tango with rehearsal partner Jonathan Roberts. Kylie Minogue performs two numbers, one while Julianne Hough and Mark Ballas dance. Macy's Stars of Dance present the Alvin Ailey American Dance Theatre dancers. A matchmaker analyzes the contestants and their partners. At the end of the night, Steve Guttenberg and his partner Anna Trebunskaya are eliminated.
Kristi, Adam, Mario, Cristian, and Marissa perform the Paso Doble. Priscilla, Marlee, Jason, and Shannon perform the Viennese Waltz. At the end of the night, Kristi Yamaguchi and Jason Taylor are tied with the highest score, while Adam Carolla receives the lowest score.
Sheryl Crow performs. Two youth ballroom dancing couples compete against each other to be able to perform again on the show. At the end of the night, Adam Carolla and Julianne Hough are eliminated.
It's Latin night. The remaining eight couples perform. Priscilla, Cristian, Kristi, and Jason perform the Rumba. Mario, Marissa, Marlee, and Shannon perform the Samba. At the end of the night, Kristi receives the highest score while Priscilla receives the lowest.
Kristi and Mark dance their rumba again. Ozomatli performs while the professional dancers dance a group number. Two more youth ballroom couples compete against each other. James Blunt performs. Priscilla Presley and Louis are eliminated.
The celebrities must dance a style they've never danced before and also learn a group dance. Jason Taylor dances the Cha Cha. Shannon Elizabeth dances the Rumba. Cristian de la Fuente dances the Foxtrot. Marissa Jaret Winokur dances the Viennese Waltz. Mario dances the Rumba. Kristi Yamaguchi dances the Jive. The group number is a western-themed dance.
Everyone does the group dance again. Ashlee Simpson performs. Dancers from Riverdance show off their skills. Two new young couples, Brittany and Brandon and Liza and Austin, compete. Brittany and Brandon move on to compete again. At the end of the night, Marlee Matlin and her partner Fabian Sanchez are eliminated.
The remaining six must perform two dances each. Marissa performs the Tango and the Rumba. Cristian performs the Viennese Waltz and the Samba, and badly injures his arm.
Def Leppard performs. Jason and Edyta are chosen to perform their Quick Step again. Kenny Mayne and Jerry Rice are back with Dance Center. At the end of the night, Shannon Elizabeth and Derek Hough were eliminated.
The remaining five couples perform two dances each. Kristi performs the Quickstep and the Samba. Mario dances the Viennese Waltz and the Jive. Marissa performs the Fox Trot and the Mambo. Jason dances the Tango and the Samba. Cristian dances the Tango and the Mambo. At the end of the night Cristian and Cheryl receive the highest score while Marisa and Tony receive the lowest.
In preparation for the big 100th episode extravaganza, the judges reflect on their top ten favorite dances of all the perfect 30s that have been given over the seasons.
Rascal Flatts performs. Apolo Anton Ohno and Julianne dance, as do Mel B. and Maks. Mario Lopez and the cast of "A Chorus Line" perform. At the end of the night, Mario and Karina are eliminated.
The final four celebrities perform. Jason and Edyta perform the Foxtrot and the Paso Doble. Marissa and Tony dance the Quickstep and the Rumba. Cristian and Cheryl perform the Viennese Waltz and the Samba. Kristi and Mark dance the Tango and the Jive. At the end of the night, Kristi and Mark receive the highest scores while Marissa and Tony have the lowest.
Kristi and Mark are chosen to perform their Tango again. The kids ballroom finalists return to perform for votes. Omarion performs while dancers dance a routine choreographed by Travis Payne to a medley of Michael Jackson songs from the Thriller album. Marissa Jaret Winokur and Tony are eliminated.
It is the finals, and there are three couples left. First, they compete in a Cha Cha Face Off, where they each perform a few minutes of Cha Cha within the same song. Then, they perform their Freestyle routine. At the end of the night, Kristi and Mark have the highest score, then Cristian and Cheryl, and Jason and Edyta end up with the lowest score.
Usher performs two numbers while professionals dance. Cristian De La Fuente and his partner Cheryl Burke are eliminated, leaving Jason and Kristi as the final two.