Samurai Jack 5

Long ago in a distant land, Aku the shape-shifting master of darkness unleashed an unspeakable evil, but a brave samurai warrior wielding a magic sword stepped forth to oppose him. Before the final blow was struck, Aku threw open a portal in time and flung the samurai into the future, where Aku's evil is law. Now the samurai seeks to return to the past and undo the future that is Aku.