Neela's faced with crippling claustrophobia while trapped in a hyperbaric chamber with a baby suffering from carbon-monoxide poisoning. Meanwhile, Chen (Ming-Na) returns from China with her ailing father; Kerry breaks bad news to a mother about her son's leukemia; and Sam ponders the repercussions of her night with Kovac. Chuck: Donal Logue. Henry: Paul Dooley. Clay: Bobby Preston.