Two years after her surgery, Melissa struggles to get to her ideal weight.

Motivated by love, 675-lb Donald begins his weight loss journey.

At 715 lbs, Henry hopes to transform himself and attend his school reunion.

Ashley aims to turn her life around after being let go due to her weight.

At nearly 1,000 pounds, Samantha is dangerously close to dying.

Whitney's determined to show the world she can still dance at 380 pounds.

Hateful jeers could derail the success of Whitney's dance class.

Whitney's new "Say-Yes" philosophy lands her in a plus-size fashion show.

Whitney confesses a secret love and faces a tough decision.

Whitney uncovers a dark truth about her suave new boyfriend.

Whitney and Heather investigate after Buddy goes missing.

Whitney uncovers a clue that sends her rushing to Buddy's parents.

Whitney helps Ashley induce labor, and Glenn announces a Hawaiian surprise.

Whitney and Heather visit Buddy in rehab.

Buddy needs to find a sober coach in order to meet the gang in Hawaii.

Whitney faces the most-excruciating experience of her life during the 8K.