Elizabeth Ruiz

Hosts Alison Sweeney and trainers Bob Harper and Jillian Michaels travel the United States in search of participants.

Hosts Alison Sweeney and trainers Bob Harper and Jillian Michaels travel the United States in search of participants.

Celebrity hairstylist Ken Paves crafts a new look for each of the seven remaining contestants; after their makeovers, the contestants share emotional reunions with their loved ones; a challenge leads to a heart-warming moment.

A contestant continues to be upset over a recent elimination; a pool challenge tests everyone's balance; a contestant reaches a milestone.

Loved ones cheer on the final four contestants as they run a marathon; a contestant confronts her unsupportive parents; two out of three finalists are determined.

Tensions are fraught when two competitors express a wish to leave. Plus, with no one knowing when a weigh-in will be called, every workout is treated like it could be the last.