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Four Corners is the first episode of the eighth season of ER, and the one hundred fifty-eighth episode overall.
Starring: Anthony Edwards (Dr. Mark Greene), Noah Wyle (Dr. John Carter), Laura Innes (Dr. Kerry Weaver), Alex Kingston (Dr. Elizabeth Corday), Paul McCrane (Dr. Robert Romano), Goran Visnjic (Dr. Luka Kovac), Maura Tierney (Nurse Abby Lockhart), Michael Michele (Dr. Cleo Finch), Erik Palladino (Dr. Dave Malucci), Ming-Na (Dr. Jing-Mei Chen)
Guest Starring: Jerome Butler (Talk Show Host), Conchata Ferrell (Mrs. Jenkins), Tamala Jones (Joanie), Conni Marie Brazelton (Conni Oligario), Laura Cerón (Chuny Marquez), Deezer D. (Malik McGrath), Yvette Freeman (Haleh Adams), Scott Anthony Leet (), Herb Mitchell (), Joan Pringle (Matronly Woman), Bellina Logan (Kit), Kristin Minter (Randi Fronczak), Monté Russell (Zadro), Jeffrey Alan Chandler (Mr. Slapinski), Erica Gimpel (Adele Newman), Jazzmun (), Iqbal Theba (Dr. Zogoiby), Jessica Townsend (Alice Jenkins), McNally Sagal (Madeline)
with Frances Sternhagen (Millicent Carter)
Co-Starring: Tab Baker (Vendor), Giancarlo Carmona (Orderly), Brian Chenoweth (Radiology Tech), Jessica Gaona (Holly), Matthew Yang King (Rick), Lindsey Higginbotham (Nurse Lindsey), Deb Podowski (Brenda), Jeris Lee Poindexter (Rafe), Nate Reese (Server #2), Emily Wagner (Pickman)
The ER has their hands full with patients after a brawl during a taping of a talk show; Weaver returns to the ER after taking time off of work and is worried that Romano has told the staff that she is a lesbian; Carter attends his grandfather's funeral; Benton deals with Cleo's meds and his sister Jackie having trouble moving on after her son's death; after the death of Derek Fossen, Greene attends a M&M conference.