Return of the Were-Rats is a fanfic written by Lucky Ladybug, and published at Fanfiction Net and Archive of Our Own on 29 January 2017. It takes place between seasons 7-8 in the 1987-1996 animated TV-series. It is part of the Exit the Fly fanverse.
Plot[]
Irma and Vernon end up getting their unstable rat mutations in the "Were-Rats from Channel 6" episode. The Turtles and Baxter Stockman must undo their transformations permanently.