Secrecy of the investigation (2000-)

Season 1 of Secrecy of the investigation premiered on Sep 01, 2000

Season 2 of Secrecy of the investigation premiered on Mar 05, 2003

Season 3 of Secrecy of the investigation premiered on Mar 01, 2004

Season 4 of Secrecy of the investigation premiered on Mar 14, 2005

Season 5 of Secrecy of the investigation premiered on Apr 24, 2006

Season 6 of Secrecy of the investigation premiered on Dec 20, 2006

Season 7 of Secrecy of the investigation premiered on Mar 26, 2008

Season 8 of Secrecy of the investigation premiered on Apr 16, 2009

Season 9 of Secrecy of the investigation premiered on Oct 24, 2011

Season 10 of Secrecy of the investigation premiered on Nov 09, 2011

Season 11 of Secrecy of the investigation premiered on May 02, 2012

Season 12 of Secrecy of the investigation premiered on Feb 04, 2013

Season 13 of Secrecy of the investigation premiered on Dec 16, 2013

Season 14 of Secrecy of the investigation premiered on Dec 15, 2014

Season 15 of Secrecy of the investigation premiered on Dec 14, 2015

Season 16 of Secrecy of the investigation premiered on Dec 05, 2016

Season 17 of Secrecy of the investigation premiered on Dec 11, 2017

Season 18 of Secrecy of the investigation premiered on Dec 17, 2018

Season 19 of Secrecy of the investigation premiered on Dec 09, 2019

Season 20 of Secrecy of the investigation premiered on Dec 14, 2020

Season 21 of Secrecy of the investigation premiered on Dec 13, 2021

Season 22 of Secrecy of the investigation premiered on Dec 05, 2022

Season 23 of Secrecy of the investigation premiered on Dec 07, 2023

Season 24 of Secrecy of the investigation premiered on Dec 09, 2024