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Kovac defies the rules to get a dying Croatian boy to Chicago in a race to save his life. Carter's sad family gathering is interrupted by Abby's mentally troubled brother Eric, who has left his voluntary care facility. Lewis and Chuck annul their marriage but choose to continue the relationship. Perez, a baseball player with a serious heart ailment, is treated on the eve of his pitching debut with the Chicago Cubs. Carter tries to prevent grieving gang member Curtis from seeking vengeance. A tormented Romano makes a dramatic decision about his mangled arm.