Broken Foot

"Broken Foot" is the 16th episode of season 4 and the 94th of the overall. It aired on August 21st 2016.

Official Description
When Leonardo secretly allies with Karai, he finds himself in deeper danger than he ever could have imagined.

Characters

 * Leonardo
 * Donatello
 * Raphael
 * Michelangelo
 * April
 * Splinter
 * Ice Cream Kitty
 * Chompy
 * Karai
 * Shinigami
 * Tiger Claw
 * Rocksteady
 * Bebop
 * Hun
 * The Purple Dragons
 * Foot Elite Bots
 * Karai's Foot Ninjas
 * Carlos Chiang O'Brien Gambe

Trivia

 * First appearance of the Foot Elite Bots and Karai's Foot Ninjas.
 * Donnie is injured in this episode and is the first time he's not involved in the fight scenes.
 * The Foot Elite Bots are similar to the Foot Elite from the 2K3 show and Mirage Comics.
 * When Raph said he wanted to become the Night Watcher, this is a reference to the 2007 movie.
 * Leonardo's costume is a reference to the Foot Clan outfit he wore in the IDW Publishing in which Leonardo was brainwashed into believing he worked for the Shredder.
 * Shinigami calls Karai "sempai" (先輩, also pronounced senpai), an honorific referring to one's upperclassman or a slightly more elder/senior individual one holds in respect.