- Season 21 Episode 9: EPISODE: 9
For the first routine, the couples perform a dance style not yet seen this season; later the couples form teams and perform side-by-side dances.
- Season 21 Episode 8: EPISODE: 8
After performances that honor influential figures in the celebrities' lives, the couple with the highest score earns immunity from next week's elimination; the remaining couples take part in a dance off; one couple is eliminated.
- Season 21 Episode 7: EPISODE: 7
Halloween-themed performances; guest co-host Leah Remini; a celebrity and their dance partner face elimination.
- Season 21 Episode 6: EPISODE: 6
The remaining couples perform iconic dance routines from movies and music videos; one couple is eliminated.
- Season 21 Episode 5: The Switch Up
Guest judge Maksim Chmerkovskiy; the celebrities and professional dancers switch partners for one week.
- Season 21 Episode 4: EPISODE: 4
The couples dance to songs that represent a significant year in the celebrities' lives for Most Memorable Year night; a couple are eliminated.
- Season 21 Episode 3: EPISODE: 3
For TV Night, the couples dance to a song that celebrates iconic shows; a couple are eliminated; an appearance by a Season 19 champion Alfonso Ribeiro and characters from 'The Muppets.'
- Season 21 Episode 1, Part 1: EPISODE: 1
A history-making dance number shot on Hollywood Boulevard; the couples perform the cha-cha, foxtrot, salsa, quickstep or jive.
- Season 21 Episode 1, Part 2: First Dances
Previously unseen moments from the prior evening and performance recaps; interviews with the couples; a preview of week two.