Take This Job And Shove It: Following its takeover by an HMO, Westphal resigns from St. Eligius by dropping trou and telling new boss John Gideon "You can kiss my ass, pal".
Tranquil Fury: After Peter White is found not guilty for rape, Westphall makes him aware that he not only is disappointed in him, but now has has no respect and utter contempt for him as a human being.
Verbal Tic: Has a tendency to address people as "pal" or "lady".
Dr. Ben Samuels (David Birney)
Chuck Cunningham Syndrome: While billed second only to Ed Flanders, his character becomes less prominent over the course of the first season. He is neither seen nor heard from again after the 20th episode of the season, and no explanation is given.
Really Gets Around: A subplot of the pilot episode involves Samuels telling all his sexual conquests that he's contracted a venereal disease.
Dr. Daniel Auschlander (Norman Lloyd)
The hospital's avuncular Chief of Services, a liver specialist who has been diagnosed with liver cancer.
Dr. Jerk: Especially earlier in the series. In the second episode, after saving a man's life with a bypass operation, he comments to the patient's young, chubby son that his son's a doctor, and that maybe the younger Craig will operate on him someday.
Good Is Not Nice: Type 2/Type 4. He is very blunt to the point of rudeness. He is impatient, fussy, and arrogant. What drives him, though, is a deep conviction in the preciousness of life, and he will not tolerate any less of others than he does himself.
Worthless Foreign Degree: In the pilot episode, Morrison tells a patient that he had to go to medical school in Mexico because his grades were not good enough for American universities. In season 3, it is revealed that the school was a shady "accelerated" program that counted experience instead of giving a full medical training, and Morrison has to fight to keep his job.
Serial Spouse: Already on husband number four at the beginning of the series. Her affair with Richard Clarendon doesn't end in marriage, but develops into a long-term cohabitation.
Your Cheating Heart: Her fourth husband leaves her in season 3 because of her affair with Richard Clarendon, the union negotiator. Apparently, this happens so often that four of her five children aren't particularly fazed by it.
Dr. Vijay Kochar (Kavi Raz)
Butt Monkey: Frequently the target of Dr. Craig's racism.
Demoted to Extra: Was a regular during season 1 and 2, only billed as a guest star thereafter.
Billing Displacement: Appears front and center on the DVD box despite him being just one part of an Ensemble Cast, arguably a more minor character than fellow residents Jack Morrison, Victor Erhlich or Wayne Fiscus.
Took a Level in Jerkass: When he comes back from corporate training with St. Elgius' new parent company, he really rubs the other residents the wrong way.
"Well Done, Son" Guy: Chandler's main motivation for getting into medicine was to please his father.
A younger nurse who usually associates with the residents.
Ax-Crazy: After being released on bail before her trial, Shirley exhibits no remorse for murdering Peter White in cold blood. On her first shift back in the ER, she pulls a gun out on a patient and refers to him as "Peter".
The Shrink: The longest lasting psychiatrist character, although less prominent than Beale or Ridley.
Warren Coolidge (Byron Stewart)
Gentle Giant: At 6' 8", he towers over patients and doctors. Used to moving effect in "Weigh In, Weigh Out", where he fulfills a dying man's request to be rocked like a baby.
Dr. Roxanne Turner (Alfre Woodard)
Dr. Carol Novino (Cindy Pickett)
Dr. Seth Griffin (Bruce Greenwood)
Heel-Faith Turn: After possibly contracting AIDS, Griffin becomes a born-again Christian when he meets the new hospital chaplain.
Smug Snake: Griffin at least started out this way, particularly when he tried to pit fellow first year residents Carol Novino and Susan Birch against each other. Birch ends up taking the fall for a patient death for which Griffin was responsible and is kicked out of the residency program.