The Pastmaster's Tower is a towering medival castle home to the undead time-traveling wizard known as the Pastmaster and a location in SWAT Kats: The Radical Squadron. A cliche crumbling evil tower, in a place that is always covered in darkness, and even a time-portal filling the sky above the tower. The local grass, trees, and shrubbery are all dead. Thunder and lightning are roaring.

This tower is where the Pastmaster dwelled and cast his evil spells from within there as he seeks to conquer Megalith City during the Dark Ages.

The remains of the Pastmaster's Tower still remain within a graveyard in modern day Megakat City.