Look For The Light
The episode was filmed in May 2022 in Calgary and Grande Prairie, Alberta. Ashley Johnson, who portrayed Ellie in the video games on which the series is based, guest starred as Anna, Ellie's mother; Mazin and Druckmann considered her inclusion important due to her proximity to the games. Druckmann had conceived Anna's story for the video games or related media but it was unused until the television series. The episode received positive reviews, with praise for its direction, cinematography, score, and performances of Pascal, Ramsey, and Johnson, though some critics found its pacing rushed. It was watched by 8.2 million viewers on its first day.
Plot
A pregnant woman, Anna, flees a pursuing infected but is bitten as she gives birth to Ellie, infecting Anna before she can cut Ellie's umbilical chord. They are found by Marlene and a group of Fireflies. Anna begs Marlene to kill her and take Ellie back to Boston, Massachusetts, lying to her and insisting she was bitten after cutting Ellie's umbilical chord. Marlene hesitates before taking Ellie and executing Anna.
In the present, Joel and Ellie arrive in Salt Lake City, Utah, in search of the Fireflies' secret lab. Ellie, still traumatized after her encounter with David, is unusually taciturn until they encounter a herd of giraffes, which lifts her mood. Joel proposes that they return to Tommy's community in Jackson, Wyoming, and forget about their destination; Ellie counters, after all they have been through, she wants to finish their journey. Joel opens up about his suicide attempt after Sarah's death, and requests Ellie tell some jokes from her book. They are ambushed by Firefly soldiers, who capture Ellie and knock Joel unconscious.
After Joel awakens in a hospital, Marlene explains doctors believe Cordyceps has been growing in Ellie's brain since birth, giving her immunity. Joel recognizes that this means the Fireflies plan to surgically remove Ellie's brain, killing her. Marlene orders two soldiers to escort Joel out of the city; Joel subdues and executes them and takes one of their rifles. He moves through the hospital to the operating room, killing most of the Firefly soldiers, including those who surrender. When the lead surgeon operating on Ellie resists giving her up, Joel shoots him in the head. He takes the unconscious Ellie and attempts to leave the hospital. Marlene intercepts them in the parking garage and tells Joel he still has time to do the right thing; he shoots her. Marlene begs for mercy but Joel kills her, claiming she would hunt Ellie down if spared.
Ellie wakes from anesthesia as Joel drives out of the city. Joel lies, telling her the Fireflies had found other immune people but were unable to create a cure, and that he escaped with Ellie after the hospital was attacked by raiders. After their car breaks down, they hike the rest of the way to Jackson. Ellie expresses survivor guilt and, at her insistence, Joel swears his story about the Fireflies is true; Ellie hesitates before replying "Okay".
Production
Conception and writing
"Look for the Light" was written by The Last of Us series creators Craig Mazin and Neil Druckmann and directed by Ali Abbasi. Druckmann wrote and co-directed the video game on which the series is based. Abbasi was announced as one of the show's directors in April 2021. Mazin stepped in after Abbasi contracted COVID-19, directing some scenes with Johnson as Anna and Joel discussing his suicide attempt; the latter was the antepenultimate day of production for the season.
The writers always intended to include Anna's scenes in the finale's cold open; Mazin felt it had more impact after following Ellie's journey—particularly after her actions in the previous episode—and provided more context to Marlene's decision later in the episode. Mazin considered the imagery of Anna with a knife while holding Ellie "the most fucked up mother and child Pietà that you've ever seen". Druckmann identified similarities between Anna's lie about when she was bitten and Joel's lie about the Fireflies, and both Marlene and Ellie's respective acceptance of these lies as the alternatives are unbearable.
Mazin enjoyed the juxtaposition of Joel's actions upon meeting Ellie—using violence by aiming his gun at her—with his actions in the final episode—using violence to save Ellie. Druckmann and Mazin are fans of Unforgiven (1992), an action film with little violence until its conclusion, which they felt was reflected in the action scene in "Look for the Light". Druckmann found the scene as sad instead of epic as it is about protecting Ellie more than killing soldiers, as reflected by the music. Mazin attempted several variations of music for the sequence, including dark and action-heavy tracks; he ultimately chose Gustavo Santaolalla's "saddest" music from the game. In the game, the music plays as Joel is carrying Ellie out of the hospital; Mazin identified Joel's emotion during the action and escape scenes were ultimately the same.
Mazin wanted to present the giraffe scene similar to the game sequence, particularly for viewers unfamiliar with the game, as he found it "gorgeous". In the game, Joel becomes more vulnerable with Ellie after she gives him a photograph of his daughter; Druckmann and Mazin felt the moment was not as grounded in the television series and replaced it with Joel's story about his attempted suicide, which they hinted at in the third episode. Marlene's final scene was recreated similar to the game, including the editing choices, as Mazin found it powerful. He was a fan of the game's ending and never considered changing it for the series. At the request of executives at HBO, an alternative ending was filmed to set up the second season, focusing on Joel's face before following him and Ellie as they walk towards Jackson. Druckmann was opposed to the alternative ending and Mazin found it "soft" in context during editing, and it was removed.