Marcia Strassman

Banfield and her husband look into adoption, while Carter adjusts to a changed ER. Sam's mother (guest star Amy Madigan) comes into the ER in an altered state of mind.

Tremors activists are sent to Juniper, Arizona to hunt down the Shriekers that have taken over the town.

Turkey ranch, Juniper, AZ. Night. A local rancher fixing the roof of his long-low turkey barn hears wood splintering. Looks off. Sees the door is torn off. Hears turkeys freaking out. And terrifying sound (the Shrieker Shriek!). Feathers fly out the barn windows. Guy jumps down, grabs shotgun. Enters barn. Screams! Twitchell (Dean Norris) arrives in Perfection with the news that Shriekers have appeared in Juniper. Another government agent is on the case, but Twitchell’s superiors want Burt (Michael Gross) and Tyler (Victor Browne) to make sure the dangerous animals are eradicated properly.

In the Emmy Award-winning series' landmark 200th episode, an innovative dual storytelling device contrasts Pratt's night shift with Carter's day shift. On the night scheduled to be his last in the emergency room, Pratt treats a woman whose unborn child was brutally cut out of her, prompting a search for the baby. He also takes care of a burned firefighter and victims from a mass cult poisoning related to the day's unnerving solar eclipse. Pratt relays the patients to Carter, whose frustration grows as he treats two of the cult members, a wounded gang member, a dying Buddhist nun and a heart attack victim. Meanwhile, Romano experiences what it's like to be a patient when he undergoes surgery.