"Impulse Control" Many criss-crossing cases in tonight's episode. J.K. Simmons and Marin Hinkle turn in fine guest-starring performances. Simmons played a man who just bought a Hummer (impulse buy), and has a heart attack and blacks up and drives over another vehicle with a family inside. Hinkle played the mother who has to watch her son suffer a broken neck and die, and her husband also dies from internal injuries. Simmons finds out that the collision with the other car is what jarred his heart back to life, ironically enough. This tears him up inside (why he lives while others died). Morris is the biggest idiot doctor wannabe ever on ER. His lack of sensitivity to the mother's need to know what happened to her family makes her super-agitated and she became very adamant about finding out what happened to her family. Too bad Sam didn't just let Morris choke to death on fries. Because of a lawsuit from the Romano era (hostile work environment), Larry from "Three's Company" shows up (with a easily to discern set of hair plugs) to observe the ER and how it works and to interview the personnel. He gets to see quite a bit of "violence" commited by the staff on visitors and patients, but he doesn't understand the context of such actions. Susan is moving steadily through her pregnancy. Frank asks her if she's going to get married, or if she's going to give birth to a bastard. hehe. Sam puts the whammy on a gang-banger scumbag college boy who knocks up his "girlfriend" who is still in high school. Of course, the scumbag will probably sue the hospital. Sam gets reprimanded for her actions, and Sam offers to leave because she can find work elsewhere, but Weaver knows that Sam has a history of this at other hospitals she's worked at in the past. Sam and Abby share their own experiences with facing abortion, Sam froze the first time, and it was too late the second visit, so she had Alex. Abby alludes to recalling what was on the wall of the clinic's walls for her visit. Carter spends his day showing off Chicago to Kimba, tries his best to convince her to stay and live in Chicago with her, but in the end, she goes, but will come back. As Carter walks out of the airport terminal, he decides he has to make one more plea, and whips out the old credit card and buys a first class ticket to Tokyo for $9000 just to get in the boarding terminal area. Abby makes a catch of T.B. on a worker that comes in for a bruised knee. The worker is an illegal alien and that was used to make him go into T.B. recovery program. Of course, Pratt gets the credit for the T.B. catch via completing a patient's history per Weaver's mandate. Abby's resigned to that outcome of her own investigative work into the worker's medical history. Carter finally makes it to work, Weaver sees him in the locker/lounge as she goes off-shift, they talk about Kimba's dedication to her patients in Africa, and then Weaver shows Carter new baby pictures of her and Sandy's child. The girl with the scumbag boyfriend shows up at the end of Sam's shift to talk to her, perhaps about her options, but we don't know how that conversation goes. Sam and Kovach get busy after a stressful day in the ER.