Partly Cloudy, Chance of Rain

An enormous rainstorm pelts Chicago. Cleo's last day at County is interrupted by the arrival of Benton's DNA results: he's not Reese's biological father. Benton meets with his lawyer regarding the trial; she advises him to let Roger see Reese; he refuses. Money from the nurses' secret stash and Frank's Palm Pilot go missing, only to turn up in Nicole's purse. She later tells Luka that she's pregnant. Susan accuses Mark of being grumpy with his patients; he spends the day treating a kid who fell in the river with his younger brother and whose parents blame him. Weaver travels to an accident site, where Pickman's ambulance was rammed by an SUV. She treats a pregnant stab wound, going as far as to give her a C-section in the broken ambulance, with Gallant's help. Weaver interracts with paramedic Sandy Lopez for the first time at the accident scene. Carter's grandmother comes in after being involved in a hit-and-run and breaking her hip. She becomes delusional in an MRI machine, calling out for her husband.