When it comes to the best television show of the year, The Last of Us on HBO might be 2023’s early front runner, especially after Episode 3, “Long Long Time.” By turns haunting and beautiful, the character-driven episode is stellar — an instant classic in the pantheon of great TV. But, despite its seeming departure from the main storyline, “Long Long Time” is anything but a standalone episode. Instead, it underscores what this series does so well: it lets everything breathe — sit with us until we feel its particular weight.