ThunderCats (comics) are held prisoner in Castle Plundarr while Wilykit and Wilykat are the personal servants of Mumm-Ra. This storyline was distinctly more mature than many episodes of the series, with much harsher language such as "bastard" used by Mumm-Ra. Cheetara is depicted as holding a grudge against Lion-O for "abandoning" his friends and leaving her to be abused by the Mutants and WilyKat's corruption in the earlier mini-series takes greater form. Realizing he has betrayed his friends, the older cub flees when the mini-series concludes. Lion-O and the ThunderCats emerge triumphant over Mumm-Ra once again. By the third mini-series, "The Dogs
Cartoon Network the checkerboard motif retained and the "C" and "N" being the centerpiece) and a new slogan, "This is Cartoon Network!" The bumpers introduced as part of the rebrand featured 2D cartoon characters from its shows interacting in a CGI city composed of sets from their shows. These bumpers lasted from 2004 to 2007. By now, nearly all of Cartoon Network's classic programming had been relocated to its sister network Boomerang to make way for new programming. The city era returned in the "OK K.O.! Let's Be Heroes" episode and Cartoon Network special "Crossover Nexus". 2005 saw the debuts of four