Mighty Morphin Alien Rangers was a Power Rangers mini-series continuing the 3rd season of Mighty Morphin Power Rangers. As with the 3rd season of Mighty Morphin Power Rangers, this miniseries used footage and monsters from the eighteenth Super Sentai series, Ninja Sentai Kakuranger; however, the Rangers' costumes from Kakuranger were now used as well. During the last airing of the miniseries until Power Rangers Zeo premiered, the "Today on Power Rangers" segments were replaced with the Zeo Serial shorts.