Secrecy of the Investigation / Season 1 Season guide Secrecy of the Investigation: Season 1 16 episodes Premiered Sep 1, 2000 Updated Jul 20, 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 1 Episode 2 Episode 3 Episode 4 Episode 5 Episode 6 Episode 7 Episode 8 Episode 9 Episode 10 Episode 11 Episode 12 Episode 13 Episode 14 Episode 15 Episode 16 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. 19% 81% Mytharc (3): Crucial lore & season climaxes Core (13): Character development & subplots Side Quest (0): Standalone / filler Show All (16) Crucial Mytharc (3) Essential Canon (16) S1·E1 Mytharc Episode 1 Sep 1, 2000 · 45 min S1·E2 Core Episode 2 Sep 1, 2000 · 45 min S1·E3 Core Episode 3 Sep 1, 2000 · 45 min S1·E4 Core Episode 4 Sep 1, 2000 · 45 min S1·E5 Core Episode 5 Nov 5, 2001 · 45 min S1·E6 Core Episode 6 Nov 5, 2001 · 45 min S1·E7 Core Episode 7 Nov 5, 2001 · 45 min S1·E8 Core Episode 8 Nov 5, 2001 · 45 min S1·E9 Core Episode 9 Nov 8, 2001 · 45 min S1·E10 Core Episode 10 Nov 8, 2001 · 45 min S1·E11 Core Episode 11 Nov 10, 2001 · 45 min S1·E12 Core Episode 12 Nov 10, 2001 · 45 min S1·E13 Core Episode 13 Nov 11, 2001 · 45 min S1·E14 Core Episode 14 Nov 11, 2001 · 45 min S1·E15 Mytharc Episode 15 Nov 13, 2001 · 45 min S1·E16 Mytharc Episode 16 Nov 13, 2001 · 45 min