The Lonely Mutation of Baxter Stockman

The Lonely Mutation of Baxter Stockman is the 16th episode of Season 2 and the 42nd overall. It aired on May 4th 2014.

Official Description
The Turtles create a retro-mutagen to help April's father; Baxter Stockman threatens to mutate April.

Characters

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

Trivia

 * Baxter Stockman mutates into a fly.
 * Kirby returns to human.
 * This is the 2nd and 3rd time April kisses Donnie.
 * When Mikey is picturing himself as a human, he envisions Greg Cipes; the voice actor that plays him.
 * Baxter mentions an idea for mutant pigs and rhinos, which foreshadows the creation of Bebop and Rocksteady.
 * The Turflytle logo transition from scene to scene is a reference to the Bat logo transition of the 1966 Batman TV series
 * The duck mutant that Baxter managed to create before his own mutation could be a reference to Ace Duck. Ace Duck is a mutant duck that was skilled in pro-wrestling. The 1987 turtles encountered him in one the books printed about them: A Visit To Stump Asteriod.
 * Donnie hides completely in his shell for the first time in this series.
 * In Baxter's lab, there are aggregated jars of organs, which is a possible reference to the 2003 series, when Baxter Stockman had body parts removed everytime he failed the Shredder.
 * Stockman's plan to turn fuse himself with April to become human is similar to Seth Brundle's plan to turn back to normal in David Cronenburg's The Fly
 * Baxer vomits acid on his food to eat. This is both a nod to the 1987 remake film David Cronenberg 's The Fly with Jeff Goldblum, and how actual flies consume their food.
 * The scene where Donnie is getting the Retromutagen from Baxter with his Grappling hook could be a reference to how Spiderman would deal with the situation.