Websep 20, 2024 · dr. Webever wondered why morris chestnut's character, dr. Barrett cain, suddenly left the medical drama the resident? Let's dive into the real reason behind his d. Websep 23, 2024 · in the resident, dr. Cain is introduced as an experienced neurosurgeon with a charming personality and almost superhuman dedication to improving patients'. Websep 20, 2024 · dr. Cain (morris chestnut), a popular but reviled villain on the resident, exited the series somewhat unceremoniously, making some fans wonder why he had to go. Barrett cain was a neurosurgeon hired by red rock medical with the expectation.