Plot summary
Bizzy demands that Addison save Susan's life, at any cost. Violet tells Naomi that she has written a book that is going to be published. Amelia and Pete work on the case of a man who needs brain surgery, but his wife won't let him get it if it's going to harm his intelligence. Cooper and Charlotte attempt to have sex for the first time since Charlotte's attack. Naomi and Sheldon read Violet's book and both approve, but when Pete reads it he questions whether Violet is going to want everyone to know every little detail of their lives.
Addison is distraught after her mother slaps her when she says that Susan is going to die; then decides to collaborate with Dr. Rodriguez in efforts to save Susan's life. After Charlotte thanks Violet for telling her about her rape, saying it helped her, Violet decides that she is going to go on a book tour. When Addison goes to tell her mother how she really feels, Bizzy confesses that she divorced the captain and is going to marry Susan.
Credits
Adapted from Wikipedia contributors, Private Practice season 4. HTML formatting and reference markers removed.