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

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

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

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

Season 4 of The investigation was conducted premiered on February 6, 2009.

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

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

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

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

Season 9 of The investigation was conducted premiered on February 1, 2014.

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

Season 11 of The investigation was conducted premiered on February 7, 2016.

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

Season 13 of The investigation was conducted premiered on February 4, 2018.

Season 14 of The investigation was conducted premiered on February 3, 2019.

Season 15 of The investigation was conducted premiered on February 2, 2020.

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

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

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

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

Season 20 of The investigation was conducted premiered on February 1, 2025.