Carter trains one of Benton's new students, Deb Chen. Hathaway has her hands full with an emotionally challenged patient who's obsessed with colors. A sociologist provokes people to measure their reaction times for a study. Kayson brings charges against Susan in the Vennerbeck death, leading Morganstern to question Susan's assertiveness. Benton and Walt hunt for Peter's missing mother.
Gastrollen:
Ming-Na Wen(Jing-Mei Chen), William H. Macy(David Morgenstern), Yvette Freeman(Haleh Adams), Ellen Crawford(Lydia Wright), Glenn Plummer(Timmy Rawlins), Vanessa Marquez(Nurse Wendy Goldman), Deezer D(Nurse Malik McGrath), Suzanne Carney(OR Nurse Janet), Ving Rhames(Walter Robbins), Sam Anderson(Dr. Jack Kayson), Emily Wagner(Doris Pickman), Beah Richards(Mae Benton), Kristin Davis(Leslie), Neil Giuntoli(Alan), John Doolittle(Mr. Desmond), Marco Rodriguez(Serena, Customs Agent), Sam Scarber(Mr. Parnell), Louis Ortiz(Jorge), Jermaine Stanley(Ben), Gerald Herring(Gang Kid), John Marshall Jones(Mr. Gaither)