The investigation was conducted (2006-)

Season 0 of The investigation was conducted premiered on Dec 30, 2010

Season 1 of The investigation was conducted premiered on Jan 20, 2006

Season 2 of The investigation was conducted premiered on Jan 19, 2007

Season 3 of The investigation was conducted premiered on Jan 18, 2008

Season 4 of The investigation was conducted premiered on Feb 06, 2009

Season 5 of The investigation was conducted premiered on Jan 22, 2010

Season 6 of The investigation was conducted premiered on Jan 22, 2011

Season 7 of The investigation was conducted premiered on Jan 29, 2012

Season 8 of The investigation was conducted premiered on Jan 19, 2013

Season 9 of The investigation was conducted premiered on Feb 01, 2014

Season 10 of The investigation was conducted premiered on Jan 31, 2015

Season 11 of The investigation was conducted premiered on Feb 07, 2016

Season 12 of The investigation was conducted premiered on Jan 29, 2017

Season 13 of The investigation was conducted premiered on Feb 04, 2018

Season 14 of The investigation was conducted premiered on Feb 03, 2019

Season 15 of The investigation was conducted premiered on Feb 02, 2020

Season 16 of The investigation was conducted premiered on Feb 21, 2021

Season 17 of The investigation was conducted premiered on Jan 23, 2022

Season 18 of The investigation was conducted premiered on Jan 28, 2023

Season 19 of The investigation was conducted premiered on Jan 28, 2024

Season 20 of The investigation was conducted premiered on Feb 01, 2025