Sword Art Online: Alicization Episode 1: Underworld
Episode 1 of 24 of Sword Art Online: Alicization, aired October 6, 2018, 50 minutes. Available with English subtitles and dub where released.
Episode summary
Kirito, along with his childhood friend, Eugeo, has been tasked with cutting down a colossal tree called the Gigas Cedar. They’re swinging their ax when their friend Alice arrives with lunch. As they eat, the three friends decide to go to a fabled cave.