From FX's official press release:

Christian and Liz grow closer when his chemotherapy makes him ill and she becomes his caretaker.  Sean reconnects with his broken family.

Nip/Tuck stars Dylan Walsh as Sean McNamara, Joely Richardson as Julia McNamara, John Hensley as Matt McNamara, Julian McMahon as Christian Troy, Kelly Carlson as Kimber Henry, and Roma Maffia as Liz Cruz.


Source: FX
(Image courtesy of FX)