Dr. Cain (Morris Chestnut), a popular but reviled villain on quotes in one ridiculous moment in The Resident.

All of this bravado is simply a cover for his true nature, which is a power-hungry and wealth-obsessed doctor who wants to make as much as possible from his patients, never thinking about the danger he's exposing them to. In season 3, Cain finds any excuse to needle Randolph Bell (Bruce Greenwood), who was demoted and replaced by Cain. Despite his villainous attitude, Cain shows some signs of humanity and after his ex-girlfriend, Justine (Aisha Kabia), dies under his operating knife, Cain shows real regret and empathy.

Dr. Barrett Cain Leaves Chastain For A Better-Paying Job At Johns Hopkins In The Resident Season 4

Cain Is Thankful For Everything He Learned At Chastain Park Memorial Hospital

Things change dramatically for D. Barrett Cain in season 4. While attempting to save a woman, Cain is hit by an ambulance and spends much of season 4 recovering from a potentially career-ending injury. At the same time, he faces a lawsuit for his improper actions during the COVID-19 pandemic. All this combines for a very humbling season for the egotistical doctor, and he's noticeably less braggadocious after his trials. However, a budding relationship with Rose (Cara Ricketts) proves to Cain that perhaps living a little more selflessly has its benefits.

In the season 4 finale, episode 14, "Past, Present, Future", Cain receives an offer to work at Johns Hopkins for much more money. Though he winds up taking the job, itting he doesn't want to make "peanuts" at Chastain, he also its he's grateful for everything he learned at the hospital.

Cain came into Chastain just looking to make a quick buck, but despite his best efforts, he was inspired by the doctors and people who came through the hospital to be better.

Before he leaves, he promises to Billie Sutton (Jessica Lucas) that he will never put his own goal above his patients ever again. It's a crucial moment in The Resident, and proof that Chastain can change even the most cynical doctor. Cain came into Chastain just looking to make a quick buck, but despite his best efforts, he was inspired by the doctors and people who came through the hospital to be better. Cain is living proof of the motivating power of Chastain.

Morris Chestnut Left The Resident Because His Contract Expired After Season 4

The Showrunners Thought About Bringing Dr. Cain Back As A Recurring Character

While some characters like Nicole Nevin left The Resident in dramatic fashion, Barrett Cain left fairly innocuously. A partial reason for this sudden departure was because Morris Chestnut's contract expired after season 4 (via Deadline). Originally, Cain was supposed to return in a recurring capacity, but the showrunners couldn't figure out a way to bring the character back (via TVLine).

One idea included Cain tempting Billie's son, Trevor (Miles Fowler), to pursue work in big pharma. Cain would represent a surgeon beholden to pharma money, and the storyline would explore the dark side of big pharma. Instead of returning as Dr. Cain in The Resident, Chestnut went on to star in the failed TV show Our Kind of People as Raymond Dupont and in the successful miniseries, The Best Man: The Final Chapters as Lance Sullivan. Chestnut is also set to have a big role in Reasonable Doubt as Corey Cash and in Watson as Dr. John Watson.