Acceptance

Summary
The episode begins with Addison on the phone, saying:
 * Addison: "Derek, I need you."

Flashback to 14 hours earlier

Naomi and Archer have spent the night together and the morning after, Archer has a seizure. Refusing to be checked out by the ER doctor and forbids her to tell Addison what has happened, Naomi is worried and confronts him about it.

At the practice, a patient is giving birth, but the labor is not progessing as Addison would like, and so she asks Dell to use a vaccum extractor to assist in the delivery. Dell is anxious as he's not used this equipment before. After the birth, Dell begins to become paranoid and believes he genuinely did something wrong, but Addison insists otherwise. He later confides in Violet, and she confides in him that she's pregnant. Violet later admits to Sheldon and Pete at the same time that she's pregnant and intends on keeping the baby.

Cooper is dealing with a 5 year old patient who needs reconstructive knee surgery, but parents abandon her at the practice. Without her parents, she cannot be signed in for surgery, and if social services are called, they will not pay for the surgery, so either way she will not be able to get the surgery. Cooper tracks down her parents, who explain that they just cannot afford to look after her anymore. Horrified, Cooper shouts at them, telling them they don't deserve her, and then tries his last hope: Charlotte. Charlotte is initially petty about it, due to Cooper moving in with Violet, but she lets this one pass as she recognises this is not about Cooper and her, but about the patient, however, she still remains angry at Cooper until he admits Violet is pregnant, angering Charlotte more, leaving Cooper to be with "his" first child.

Archer reveals to Naomi that he has a tumor (glioma in the third ventricle of his brain) which in inoperable. Naomi confides in Sam, who tells her she is either keeping a secret for the man she loves, or lies to her best friend. She chooses to tell Addison, who is devastated and gets Archer's last set of CT scans from New York.

Asking Archer up for a consult and with the Oceanside Wellness staff, Addison begins to work out a treatment plan, until Sam realises he has an upward gaze palsy - meaning it's not a tumor. Addison orders another CT at St. Ambrose Hospital where they see the "tumor" has grown to at least double its size, leading Archer to deduce its neurocysticercosis - parasites in his brain. He forbid that she calls Derek, and insists on anti-parasitic medication, as surgery is too risky.

Back at home, Addison and Archer reminisce about when they were younger, and Addison admits she can't bare to loose him. Archer later has another seizure, and this time won't stop, leading to him being sedated and Addison calling Derek and having Archer taken by medivac to Seattle, taking Naomi with her.

Medical Staff

 * Kate Walsh ... Dr. Addison Montgomery
 * Tim Daly ... Dr. Pete Wilder
 * Audra McDonald ... Dr. Naomi Bennett
 * Paul Adelstein ... Dr. Cooper Freedman
 * KaDee Strickland ... Dr. Charlotte King
 * Chris Lowell ... William 'Dell' Parker
 * Taye Diggs ... Dr. Sam Bennett
 * Amy Brenneman ... Dr. Violet Turner

Guest Starring

 * Grant Show ... Dr. Archer Montgomery
 * Brian Benben ... Dr. Sheldon Wallace

Patients and relatives

 * Tom Choi ... Jake
 * Alyssa Shafer ... Patty