In the seventh episode of The Last of Us, titled "Left Behind," Ellie relives her past with Riley in an abandoned mall while grappling with her decision to save a critically injured Joel. Around the 52:52 mark, the episode shows Ellie tenderly sewing Joel's wound in a desperate attempt to keep him alive. Detailed recaps and full recaps can be found at Collider and The Guardian . The Last of Us HBO episode 7 recap: Ellie’s origin story