Season 0 of Cities of the Underworld premiered on March 2, 2006.

Season 1 of Cities of the Underworld premiered on March 2, 2007.

Season 2 of Cities of the Underworld premiered on January 28, 2008.

Season 3 of Cities of the Underworld premiered on October 26, 2008.

Season 4 of Cities of the Underworld premiered on September 7, 2021.