As a resident his confidence grows, and he often goes out of the way to help patients.During Season 6, Carter and his friend and medical student Lucy Knight (Kellie Martin) are stabbed by patient Paul Sobricki (David Krumholtz), a law student suffering from schizophrenia.Kem's pregnancy ends tragically at eight months forcing her to give birth to a stillborn son in the episode "Midnight", much to her and Carter's overwhelming grief.
While he did so in Season 12, his Season 13 episodes were pushed back a year to season 14.
After Abby Lockhart (Maura Tierney) catches him injecting left-over fentanyl from a trauma into his wrist, Carter's colleagues hold an intervention and Dr.
Greene demands that he go to an inpatient rehab center for medical doctors in Atlanta or be fired. Benton convinces him and boards the plane with him.
He arranges for Kovač to be sent home, and sends a letter for Abby ending their relationship. Carter remains in Africa for several months and works in Kem's AIDS clinic.
Carter and Kem develop a relationship and when she becomes pregnant he asks her to accompany him to Chicago where he introduces her to his colleagues.
In the Season 15 episode, "The Book of Abby", long-serving nurse Haleh Adams shows the departing Abby Lockhart a closet wall where all the past doctors and employees have put their locker name tags.