Tammy takes small steps towards independence, Amy moves home but struggles with ghosts of the past, the sisters get new looks to go with their new attitude, and an upcoming Dr. Smith appointment has everyone on edge.

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 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.

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

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

Tammy and Amy beef over their big night out.

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.

The family arrives in London for their first international vacation and learns even more surprising news about their ancestry.

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