Kovac defies the rules to get a dying Croatian boy to Chicago in a race to save his life. Despite receiving tragic news, Carter tries to prevent grieving gang member Curtis from seeking vengeance. Carter's sad family gathering is interrupted by Abby's mentally troubled brother Eric, who has left his voluntary care facility. Meanwhile, Lewis has trouble ending her relationship with Chuck. Perez, a baseball playerwith a serious heart ailment, is treated on the eve of his pitching debut with the Chicago Cubs. And a tormented Romano makes a dramatic decision about his mangled arm.
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