"When You're Lost in the Darkness" is the series premiere of the American post-apocalyptic drama television series The Last of Us. Written by series creators Craig Mazin and Neil Druckmann and directed by Mazin, the episode aired on HBO on January 15, 2023. The first episode of the first season, it introduces Joel and his daughter Sarah during the chaos of a global pandemic outbreak caused by a mutated form of the Cordyceps fungus that turns its victims into bloodthirsty attackers. Twenty years later, Joel and Tess set out to find Joel's brother Tommy and are tasked with smuggling the young Ellie in exchange for supplies.