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 Episodes S1·E1 Episode 1 Sep 1, 2000 · 45 min S1·E2 Episode 2 Sep 1, 2000 · 45 min S1·E3 Episode 3 Sep 1, 2000 · 45 min S1·E4 Episode 4 Sep 1, 2000 · 45 min S1·E5 Episode 5 Nov 5, 2001 · 45 min S1·E6 Episode 6 Nov 5, 2001 · 45 min S1·E7 Episode 7 Nov 5, 2001 · 45 min S1·E8 Episode 8 Nov 5, 2001 · 45 min S1·E9 Episode 9 Nov 8, 2001 · 45 min S1·E10 Episode 10 Nov 8, 2001 · 45 min S1·E11 Episode 11 Nov 10, 2001 · 45 min S1·E12 Episode 12 Nov 10, 2001 · 45 min S1·E13 Episode 13 Nov 11, 2001 · 45 min S1·E14 Episode 14 Nov 11, 2001 · 45 min S1·E15 Episode 15 Nov 13, 2001 · 45 min S1·E16 Episode 16 Nov 13, 2001 · 45 min