Susan Merson

Derek looks for the perfect way to propose to Meredith; Lexie wants Mark to go public with their relationship; Bailey considers taking her medical career in a new direction.

Derek and Addison face off as they try to save a pregnant patient's life; a surgeon botches a standard procedure; Bailey is shocked by the chief's recommendation letter.

A college football player's death bothers Nate; Federico's request to borrow money is rejected.

After a man posing as him dies, Frasier reads his own obituary and regrets the decisions in his life.

Grissom and the team battle the flu while investigating the deaths of several key witnesses in a grand jury case involving a dangerous Las Vegas gang.