Good samaritan Luka stops to help a woman with a flat tire, and watches her get hit by a reckless driver. Abby discovers that she passed her boards. Pratt is concerned about Chen when she comes to work with a black eye. Neela heads for the University... (more) of Michigan to begin her internship but decides not to follow through. When Steve announces his intentions to stay in Chicago, Sam decides to leave town. The custody battle for Henry Lopez goes before a judge. While Pratt drives Elgin Gibbs home en route to dinner with Chen, the three are shot at by an irritated driver.