A patient's pet causes pandemonium in the ER; a man experiences paralysis that climbs up his legs to his chest until he can no longer breathe; and a war veteran suffers from phantom pain in his amputated hand.
A new nurse makes a shocking mistake; a patient appears to be hallucinating and sends ER staff on a wild goose chase; doctors must determine what is wrong with their patient, a former EMT who was found lethargic and slurring his words.
An urgent care physician must quickly think outside the box to care for two emergencies at once; a woman with abdominal pains receives an unexpected diagnosis; and a yoga instructor has a dangerously high temperature for no obvious reason.
A fishing lure embedded in a man's face turns out to be the least of his problems; a pair of unconscious teenagers are brought to the ER where dramatic family secrets are revealed; an ER tech collapses and then refuses traditional medical treatment
A man's itchy rash turns out to be more than just poison oak; a young woman is bleeding profusely from the inside of her lip, but there is no obvious cause; a family of three is admitted as car accident victims, but the doctor makes a shocking discovery.
A surfer is impaled between the legs; a football player with severe leg pain leads to an unexpected diagnosis; a woman is given a powerful clot-busting drug to cure her stroke, but she has another condition that could cause that same drug to kill her.
Two separate car crash victims are brought to the ER in their underwear; a woman is acting delusional and refuses to allows the ER staff to touch her; and a doctor struggles to diagnose a dehydrated and nauseous 10-year-old.
A patient comes to the ER with a live shark clamped onto his thigh, and he wants to save the shark; complications arise for a woman with a life-threatening condition, and the mysterious condition that caused a man to pass out.