Toonami (a portmanteau of the words cartoon and tsunami suggesting a 'tidal wave' of animated shows) is a brand of Cartoon Network, used initially for action-oriented programming blocks on Cartoon Network television channels worldwide, mostly showing American cartoons and Japanese anime, began airing in the United States on March 17, 1997, and was dropped on September 20, 2008. A newly designed Toonami block began airing on May 26, 2012 and continues as a Saturday night anime block on Adult Swim. Toonami was Cartoon Network's primary action-animation block. The block, which made its world premiere on Monday, March 17, 1997, initially replaced Power Zone, Cartoon Network's most recent incarnation of the Super Adventures block which had been a staple on the network since October 1, 1992. Toonami was originally a weekday afternoon cartoon and anime block hosted by Space Ghost villain-turned-producer Moltar at the Ghost Planet Industries building from 1997 to July 9, 1999.