The Creeping Doom

"The Creeping Doom" is the 22nd episode of Teenage Mutant Ninja Turtles season 3 and the 74th episode overall. It aired on August 23rd, 2015.

Official Description
After an accident, Donnie finds himself slowly losing his intelligence.

Characters

 * Leonardo
 * Donatello
 * Raphael
 * Michelangelo
 * Splinter
 * April O' Neil
 * Ice Cream Kitty
 * The Creep
 * Son of Snakeweed
 * Creepweed

Trivia

 * Last appearance of The Creep.
 * First and only appearance of Son of Snakeweed and Creepweed.
 * Creepweed is also the second mutant to be made from other mutants, the first being Mega Shredder.
 * This is the first time Raph has no mask on.
 * It is also the 2nd time Leo has no mask on.
 * Michelangelo reveals that he has a photographic-memory.
 * The Turtles have a periscope on top of the spiral staircase.
 * The computer game Donnie was playing is called Pin Pong which started in the 1980s.
 * Swamp Creatures take Manhattan is a reference to the Friday 13th sequel, Jason Takes Manhattan.
 * The items on Donatello's shelf of collectables were: the Kraang Communication Orb, the Obturaculum Somniorum, aFoot-Bot's head, a Kraangdroid's head, the Creep, and a Snakeweed's claw.
 * The only noticible difference between Snakeweed and his "son" is that Son of Snakeweed does not talk.
 * Creepweed is the third plant-like mutant with regenerative abilities to be introduced in the series, it's also the fusion of the first and the second: Snakeweed and the Creep.