-Walter Brown is found stabbed to death in his apartment with $50,000 floating out of his window. He was a lottery winner who was generous with his cash.
-Megan determines that he had an endocrine tumor which could have caused behavioral changes. Unfortunately, most of his friends wrote off the changes as due to the lottery.
-Walter's best friend came to confront him about his behavior. Walter became erratic and brandished a large chef's knife. In the ensuing struggle, Walter fell and was accidentally killed.
-Kimberly Gleason went into the hospital for an appendectomy and died of a serious bacterial infection. Ethan has trouble finding the cause until a second patient turns up dead.
-Turns out the masks in the ER were contaminated. With Kate's help, Ethan learns how to run an investigation and deal with the family members.
-Lacy uses her mother's credit card without permission to buy a $300 cashmere hat. Megan returns it and makes Lacy work at the morgue to earn her own money.