Guest Stars Peter Jacobson as Dr. Christopher Taub Olivia Wilde as Dr. Remy "Thirteen" Hadley Kal Penn as Dr. Lawrence Kutner Anne Dudek as Dr. Amber Volakis Edi Gathegi as Cole Andy Comeau as Brennan Frank Whaley as James/Mr. X Co Starring Bobbin Bergstrom as Nurse #2 Brendan Michael Coughlin as Mickey Lucius Baybak as Tony