Catch up with the star before she returns to the ABC drama on April 1. Mesa is the showâs first indigenous doctor on the medical drama in its 17 season run. His next appearance will be in the April 15 episode, after which heâll make regular appearances. - Advertisement - Chee was first introduced to the show in the third episode of the current season, back in November, when he was part of a group of interns at Grey Sloan Memorial Hospital. Mesa is a Navajo/Soboba actor. His previous credits include the Netflix horror series