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 Carmen Argenziano as Henry Dobson Meera Simhan as Jody Essence Atkins as Greta Jonathan Sadowski as Dr. Mason Jason Manuel Olazábal as O'Reilly Caitlin Dahl as Twin 15B Heather Fox as Ashka Melinda Dahl as Twin 15A Co Starring Bobbin Bergstrom as Nurse #2 Larkin Campbell as Dave Kathryn Adams as Number 23 Jaimarie Bjorge as Beautiful Doctor
