Champion Jenna Johnson challenges the eight couples to create a passionate routine that builds trust and chemistry while tackling the Rumba and Argentine Tango. For the first time, they choose partners, but the lowest-scoring pair will be eliminated.

Witney Carson joins to push dancers to face their toughest challenge yet, teaching ballroom novices. Paired with "Dancing with the Stars" superfans, they have just two days to prepare a performance as they compete for a spot in the semifinals.