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.

Whitney confesses a secret love and faces a tough decision.

Whitney uncovers a dark truth about her suave new boyfriend.

Whitney is shell-shocked by a chance encounter with her ex-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.

Fresh off the 8K, Whitney is forced to re-evaluate her goals.

With his rehab treatment coming to an end, Buddy must decide where to live.

Whitney announces an alarming plan to start a family.