In the season finale, The Carver attacks a sorority house as Kit grows closer to catching her nemesis. Sean, Christian, Matt and Cherry Peck are involved in separate games of torture. Julia makes a discovery. And the identity of The Carver is revealed.

Christian learns the truth about Kimber's wedding-day disappearance when he receives a grisly clue from The Carver. Detective Kit McGraw brings Carver suspect Quentin in for questioning.

A shopping-mall Mrs. Santa Claus comes to McNamara/Troy for liposuction before the holidays, but a discovery during surgery jeopardizes her marriage to Mr. Claus. Julia must make a decision that could profoundly affect the rest of her family's lives.

A jet bound from Miami to New York crashes after takeoff--and Julia's mother, Erica, may be on board. Christian, Sean, Liz and Julia struggle to save the lives of surviving passengers, and Sean must amputate the arms of one of the crash victims.

Furious that Quentin is dating Julia, Sean resolves to do whatever it takes to force Quentin out of the practice. Christian claims to be fine after Kimber's sudden exit, but his relationship with a patient indicates otherwise.

Christian and Kimber put the final touches on their wedding plans, but an unsigned prenuptial agreement casts a shadow of doubt across the occasion. Christian and Sean are stunned when Matt's new girlfriend, Ariel Alderman, reveals her racist beliefs.

The working relationship between Christian and Quentin worsens when they have an ethical disagreement over a groundbreaking surgery. Sean doesn't want Nikki to disappear into the Witness Protection Program without him.

Sean questions his growing romantic feelings for Nikki when he learns the dark truth about her past. The request for plastic surgery from a patient with Down Syndrome moves Christian to contact his birth mother. Quentin woos Julia.

A patient's extreme request leaves Christian struggling between what the medical establishment says is right and what the patient says will make him feel whole. After leaving McNamara/Troy, Sean takes his surgery skills to the Witness Protection Program.

McNamara/Troy is in dire financial straits after Christian's arrest. Gina returns and forms an unexpected business alliance with Julia. Sean and Christian reluctantly become involved in a gruesome case.

Christian becomes the prime suspect in the Carver case after police find a damning piece of evidence at the scene of the latest Carver attack. An HIV-positive man who suffers from facial wasting comes to McNamara/Troy to have his appearance restored.

Christian has doubts about the latest Carver victim's story. The wife of an Alzheimer's patient requests extensive cosmetic surgery to find a way back into her husband's memories. Sean finds himself under investigation by Child Protective Services.

Sean, Julia and Christian struggle to find a solution as Matt spirals out of control. Christian performs surgery at his former fraternity house to help cover up a hazing ritual gone awry. Christian's open relationship with Kit and Kimber loses its appeal.

Christian and Liz perform cosmetic surgery on an extraordinary ape to help her chances of reproducing. After learning that Ava is a transgender woman, Matt questions his own sexuality and heads down a dark path. Tensions escalate at McNamara/Troy.

In the aftermath of Christian's attack by "The Carver," Sean must forge a new partnership to keep the practice going. The police request Sean's medical expertise for an obese woman named Momma Boone who has not left her home for over three years.