Chain Letters / Season 1 ▦ Season guide Chain Letters: Season 1 18 episodes Updated Oct 12, 2026 Spoiler-safe Advertisement Season 1 Episodes Episode Guide 🛡️ SPOILER SHIELD Season 1 Progress Shield All Safe I'm Watching Caught Up Season: Season 1 Last Watched: None (Not started) Episode 2 Episode 3 Episode 4 Episode 7 Episode 9 Episode 12 Episode 14 Episode 15 Episode 16 Episode 17 Episode 18 Episode 19 Episode 20 Episode 21 Episode 22 Episode 23 Episode 24 Episode 25 Future titles & synopses blurred. Tap "Reveal" on any card to peek. Binge Efficiency Engine Season 1: Filler vs. Essential Canon Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests. 11% 89% Mytharc (2): Crucial lore & season climaxes Core (16): Character development & subplots Side Quest (0): Standalone / filler Show All (18) Crucial Mytharc (2) Essential Canon (18) S1·E2 Core Series 1, Show 2 Sep 8, 1987 · 30 min S1·E3 Core Series 1, Show 3 Sep 9, 1987 · 30 min S1·E4 Core Series 1, Show 4 Sep 10, 1987 · 30 min S1·E7 Core Series 1, Show 7 Sep 15, 1987 · 30 min S1·E9 Core Series 1, Show 9 Sep 17, 1987 · 30 min S1·E12 Core Series 1, Show 12 Sep 22, 1987 · 30 min S1·E14 Core Series 1, Show 14 Sep 24, 1987 · 30 min S1·E15 Core Series 1, Show 15 Sep 25, 1987 · 30 min S1·E16 Core Series 1, Show 16 Sep 28, 1987 · 30 min S1·E17 Core Series 1, Show 17 Sep 29, 1987 · 30 min S1·E18 Core Series 1, Show 18 Sep 30, 1987 · 30 min S1·E19 Core Series 1, Show 19 Oct 1, 1987 · 30 min S1·E20 Core Series 1, Show 20 Oct 2, 1987 · 30 min S1·E21 Core Series 1, Show 21 Oct 5, 1987 · 30 min S1·E22 Core Series 1, Show 22 Oct 6, 1987 · 30 min S1·E23 Core Series 1, Show 23 Oct 7, 1987 · 30 min S1·E24 Mytharc Series 1, Show 24 Oct 8, 1987 · 30 min S1·E25 Mytharc Series 1, Show 25 Oct 9, 1987 · 30 min Advertisement