The show was focused on a group of warriors assembled by Raiden (spelled Rayden in the series) to defend Earthrealm from invaders who entered through portals from various other dimensions. Driven by purpose and bound by honor, these are the Defenders of the Realm!' Only the most extraordinary warriors can possibly meet this challenge: Liu Kang, Princess Kitana, Sub-Zero, Jax, Sonya Blade, Nightwolf, Kiva, Kurtis Stryker. These attacks are seriously weakening Earth's dimensional fabric, enabling not only Outworlders to enter the Earthrealm, but warriors from other domains as well. Dark Forces of Outworld have begun invading the Earthrealm. 'Much has changed since the last Mortal Kombat tournament. The show serves as a combination of an alternative sequel to the first Mortal Kombat film and the events of Ultimate Mortal Kombat 3. Produced by Threshold Entertainment and Film Roman, it aired on the USA Network's Action Extreme Team animation block for one season of thirteen episodes from September to December 1996, back-to-back with the Street Fighter animated series. Mortal Kombat: Defenders of the Realm is a 1996 American animated series based on the popular Mortal Kombat video game series.