For the first time ever, Dr. Smith holds an all-sibling weigh-in appointment,and the moment of truth is a tough pill to swallow for some.

Tammy, Amy and their siblings sit down to watch their most memorable clips.

Tammy addresses Amy about her weight gain and the family heads to Pittsburgh for Tammy's skin removal surgery.

The family deals with the aftermath of Amy's meltdown. Back home, Chris gets skin removal surgery. Amy has a risqué photoshoot. Tammy finds doctors who can do her skin removal surgery but some test results force Tammy to confess a long-held secret.

Tammy's skin removal surgery is still up in the air as she struggles to kick bad habits. Amy's got a new roommate and a new man. Chris' plays referee between Brittany and their new neighbor. Tammy is keeping a secret from her family.

When the siblings react to Amy's proposal, relationships are fractured.

As Tammy heads home after 14 months in rehab, she's forced to make the most difficult decision of her life. Fed up with not having help, Amy feels her marriage is starting to unravel. Amanda and Misty reveal they're getting bariatric surgery.

After the blowout with Michael, Amy makes the hardest decision of her life; Chris and Tammy have a long-overdue appointment with Dr. Smith; worried about surgery, Amanda and Misty do a last-minute cleanse to sweat out nicotine.

Everyone prepares for London amid another flare up between Tammy and Amanda while Chris and Tammy visit Dr. Turner hoping to get approved for skin removal surgery.

Tammy takes a big step forward in her relationship with Andrea.

Amy sees a paediatric dietitian and faces some difficult truths about Gage's diet. Dr. Smith makes a house call and confronts Tammy about her partying lifestyle. While on the road with Chris, Tammy's health hits a dangerous low point.

Amy is ashamed of her behavior in Florida and wants to make amends, but she worries Amanda won't accept her apology; when Tammy gets some devastating news, her whole world is turned upside down, and her family rallies behind her in support.

Tammy and Amy beef over their big night out.

Amy reels emotionally and physically from her camel bite and arrest. Chris explores a passion project, and Tammy expands her circle and fulfills a childhood dream.

A missing tool in the operating room causes delays to Tammy's extreme skin removal and Amy decides she's had enough and makes a bold move.

Tammy hosts a housewarming party and has a few choice words for her mom; Amy's world is turned upside down when she finally confronts Michael over his lack of help with raising their two boys; meanwhile, Caleb hasn't been honest with Tammy.

Tammy needs a new place to live but finds more problems than solutions and Amy makes a peace offering with some highly questionable ingredients.

A time for cheer is met with jeer as the entire family remains divided during Christmas.

Tammy has her heart set on skin removal but is met with a roadblock.

Chris gears up for his upcoming appointment with a plastic surgeon and encourages Tammy to tag along.

Tammy gets a push to reveal her personal life to her family. Amy's life gets even more chaotic, pushing her to make a rash decision. Chris and his wife make a big decision about her health.

Tammy reveals to her sisters that she's dating a woman and their reaction surprises her. Chris and Tammy check-in on their skin removal progress, and a harrowing moment at the petting zoo sees Amy's life turned upside down.

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Amy faces Michael in court at their first divorce hearing. Chris finds an unusual way to get healthy food. Tammy explores the possibility of having kids. Later, Tammy heads to rehab for a recon mission after learning some information about Caleb.

Caleb surprises Tammy with a romantic dinner date, but it goes south when Tammy learns what's on the menu. The Slatons attend a Zumba class together, but Amy's lack of self-care leads to a meltdown that has the whole family feeling déjà vu.