The Deadly Venom

"The Deadly Venom" is the 18th episode of season 3 and 70th overall. It aired on May 17th 2015.

Official Description
When Karai is brainwashed, she begins hunting the Turtles.

Characters

 * Leonardo
 * Donatello
 * Raphael
 * Michelangelo
 * Splinter
 * April O' Neil
 * Casey Jones
 * Kirby O' Neil
 * Karai
 * Shredder
 * Rocksteady
 * Stockman Fly
 * The Foot Bots

Trivia

 * This is the first time The Turtles (2nd time for Raph), April and Casey are poisoned.
 * Casey fights Karai for the 1st time.
 * Splinter is still recovering from his injuries he got from Slash in The Clash of The Mutanimals.
 * The title of this episode as well as the movie Six Deadly Poisons that April and Casey Jones watched is play on the movie Five Deadly Venoms.
 * The Six Deadly Poisons movie title also references the fact that 6 characters were poisoned during the episode.
 * This episode features the stuffed iguana from "Follow The Leader" as well as the troll mask from "Mazes & Mutants."
 * Casey's bike has two buttons named Betty and Veronica as a reference to the characters from the Archie Comics.
 * Splinter has 2 daruma dolls on his shelf, one has both eyes painted, meaning he has fullfilled a goal, and the oher one with only eye painted, meanig he still has to accomplish something.
 * Mikey's "New A-Team!" referred to the season 1 episode "Mousers Attack!."