S10, E21: When Carter suspects a problem, he rushes his pregnant girlfriend, Kem (recurring guest star Thandie Newton), to the emergency room. Corday gets a jolt from the past when the late Greene's teen daughter, Rachel (recurring guest star Hallee Hirsh), shows up with her boyfriend, looking for a haven--and some "morning-after" pills. Meanwhile, Neela prepares for her medical school graduation by welcoming 20 family members, and Abby--who hasn't passed the boards (state medical licensing written exam) yet--prefers not to attend. Neela and Pratt seek out an overweight teenager whose blood pressure could indicate deadly heart disease. Sam is uneasy about her son's father, Steve (recurring guest star Cole Hauser), moving back to her apartment, and Frank (recurring guest star Troy Evans - "China Beach") loudly returns to work after recovering from his heart attack.