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ER: Chaos Theory

The hospital remains in lockdown while the Center for Disease Control probes a mysterious and deadly illness that leaves Dr. Carter, Abby and others quarantined. While Dr. Lewis initially is left alone and fights to save one patient, Carter and Abby grow resolved to their romantic fate over the next several days as they idle away their time inside the hospital with Drs. Chen and Pratt -- and veteran patient Stan the Can. Meanwhile, newly widowed Dr. Corday struggles to adapt to her new medical practice in her native England while over-shadowed by her attentive parents.

Episode Info

Episode number: 9x1
Production Number: 175151
Airdate: Thursday September 26th, 2002

Alternate Airdates:

FI (MTV3) Feb 06, 2003

  • Currently 8/10
8/10 (1 Vote cast)
Guest Stars
Christopher Grove
As Dr. Marty Kline
Claire Jacobs
As Mrs. Daniels
David Allen Brooks
As Gunn
David Hayward
As Mother
Dee Freeman
As Dr. Lutz
Demetrius Navarro
As Morales
Diane Delano
As Stella Willis
Dinah Lenney
As Nurse Shirley
Eric Payne
As Police Officer (as Eric A. Payne)
Harrison Page
As Stan
Heidi Swedberg
As Robin Turner
John Aylward
As Dr. Donald Anspaugh
John C. McDonnell
As Rick
Judy Parfitt
As Isabelle Corday
Kris Murphy
As Flight Nurse
Miranda Kwok
As Kristen Shoop
Nadia Shazana
As Jacy
Paul Freeman
As Dr. Charles Corday
Paul Hipp
As Craig Turner
Perry Anzilotti
As Perry, Anesthesiologist
Troy Evans
As Frank Martin
Alpheus Merchant
As Elderly Man
B.J. Ward
As Unknown
Charles Martinet
As Eddy (as Charles Martinez)
Deji LaRay
As Tye Reynolds (as Deji Olasimbo)
James Ward
As Scientist (as James K. Ward)
Jillie Mack
As Mrs. Newberry
Jim Piddock
As Dr. Earl Whitehead
Joe Sabatino
As Helicopter Pilot
Kaline Carr
As Dr. Stephanie Rioux
Michael Muhney
As Colin Prentice
Michael Yama
As Epidemiologist
Shirley Jordan
As IDC Analyst
Toby Rolt
As Senior House Official

Barrett Rakestraw
As Ambulance Driver
Main Cast
Noah Wyle
As Dr. John Carter
Goran Visnjic
As Dr. Luka Kovac
Maura Tierney
As Dr. Abby Lockhart
Mekhi Phifer
As Dr. Gregory Pratt
Alex Kingston
As Dr. Elizabeth Corday
Laura Innes
As Dr. Kerry Weaver
Sherry Stringfield
As Dr. Susan Lewis
As Dr. Jing-Mei "Deb" Chen
Sharif Atkins
As Dr. Michael Gallant
Paul McCrane
As Dr. Robert Romano
Episode Notes
Mekhi Phifer becomes a series regular with this episode.

Working Title: "Unknown Origin"

Warning: ER season 9 episode 1 guide may contain spoilers
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