Ernesto celebrates with Jimmy over him getting hired at HHM. Howard makes Ernesto leave as he tells Jimmy that he will in fact, not be working at HHM. ("").
Ernesto is put in charge of bringing supplies to Chuck. When he doesn't bring the right items, Chuck tells Ernesto to get it right next time. Ernesto leaves the house and to his surprise, Jimmy is outside. The two exchange hellos, and Ernesto drives off. ("")
Ernesto calls Jimmy and tells him that his brother is not doing well, and is insisting on Ernesto not calling a doctor for him. Jimmy tells Ernesto to make him chicken broth and to wrap him in multiple space blankets. Jimmy also insists on not calling a doctor. ("")
Ernesto goes to the copy shop to ask the clerk if Jimmy was in his store. The clerk confirms that Jimmy was in the store. Ernesto leaves and tells Chuck about his findings. Chuck returns to the store with Ernesto to confront the clerk. Having been paid off by Jimmy, the clerk denies ever seeing Jimmy, making Chuck irate. Ernesto attempts to get Chuck to calm down, but Chuck eventually gets overwhelmed by the electricity and hits his head on the counter. ("")
Ernesto helps Chuck after he takes his fall. After being put in stable condition, Jimmy and Ernesto go in to check on Chuck, with Chuck accusing Jimmy of bribing the copy store clerk after learning that Jimmy was there moments after he fell, but Ernesto clears him, claiming that he called Jimmy before they went to the store. Outside, Jimmy asks why Ernesto lied on his behalf, to which he answers that Chuck's increasingly vindictive nature was beginning to alarm him, and he didn't want to see his friend get in trouble. ("")
Ernesto brings Chuck his groceries, including a new pack of batteries for his tape recorder. Chuck has Ernesto change the batteries, resulting in Ernesto "accidentally" hearing part of the incriminating tape Chuck made of Jimmy. Ernesto is disturbed by what he hears and is subtly threatened by Chuck into not saying anything to anyone. In reality, Chuck orchestrated this to transpire on purpose. ("")
Troubled by the incident, Ernesto drives to Jimmy and Kim's new law office, and asks Kim to meet him in his car outside. Ernesto is conflicted, wanting to do right by Jimmy while also worried about Chuck's legal threat. Eventually, Kim learns from Ernesto that Chuck taped Jimmy's confession to doctoring the Mesa Verde files. It is revealed that Chuck used Ernesto as a pawn in order to coax Jimmy into breaking into his house to steal the tape.("")
In a flashback to after Jimmy becomes a lawyer, Ernesto is present along with Kim as Chuck vouches for Jimmy. Afterwards, Ernesto rather badly sings Total Eclipse of the Heart karaoke at Jimmy's celebration party causing Jimmy and Kim to comment that "Ernie's really going for it." ("")
- Ernesto drives a 2004 Mitsubishi Lancer Evolution VIII.