When the Past Master returns in Megakat City and reeks havoc, the Swat Kats come to stop him. Little do they know the Past Master planned it that way, and creates a time portal to send them into the future, hoping he will get rid of them there.
And this isn't just any future; the Metallikats have taken over Megakat City (now called Metallikat City) and all the non-metallic life forms have been enslaved. The Swat Kats manage to escape from the metallic guards sent after them and hide in a swamp, where they meet other survivors. These survivors include Commander Ferral, his neice, Felina, Mayor Manx, Callie, and Professor Hackle.
They explain to the Swat Kats what happened to their once glorious city and how these future Swat Kats tried to stop the Metallikats but were killed. The Swat Kats decide to help them, but they need to infiltrate the Metallikat Headquarters.
They form an unlikely alliance with none other than the Past Master, who seeks revenge on the Metallikats for double crossing him.
What follows next is a fight between the Swat Kats and the Metallikats that shouldn't be missed for anything in the world.
This episode has to be seen to be believed.