Plot summary
Charlotte hires a new ER attending, Dr. James Peterson to replace Pete, promising him a quiet ER only to have a rainy night in LA. All of the doctors deal with their patients. Addison has to deal with a pregnant woman having her fourth child, and her husband who seems to always have the same symptoms as her only to find out the husband has an infection in his spinal cord, so Amelia and the new ER doctor race to save the man's life. Sheldon continues to try and treat his suicidal patient.
Cooper and Violet deal with a little girl who has broken her arm, and whose parents keep on fighting nearby. Things take a turn for the worse when the little girl goes missing, and Sheldon suspects his patient. Sam's relationship comes to an end when Addison accidentally reveals to his girlfriend that they used to date, and that they live next door to each other, things she assumed she'd already known. Charlotte is shocked that Dr. Peterson found out that she's pregnant.
Credits
Adapted from Wikipedia contributors, Private Practice season 6. HTML formatting and reference markers removed.