Bat In The Belfry

"Bat In The Belfry" is the 19th episode of season 4 and the 97th of the overall. It aired on September 11th 2016.

Official Description
Michelangelo befriends some odd, new superheroes named Wingnut and Screwloose.

Characters

 * Leonardo
 * Donatello
 * Raphael
 * Michelangelo
 * April
 * Casey
 * Splinter
 * Wingnut
 * Screwloose
 * Monoculus
 * Skullface McGillin
 * Hun
 * The Purple Dragons

Trivia

 * First and only appearance of Wingnut, Screwloose, Monoculus and Skullface.
 * There are several references to the DC Comics character Batman.
 * The episode's title is similar to the first episode of the 2004 Batman animated series, "The Bat in the Belfry".
 * Wingnut is voiced by Daran Norris, who voiced Batman in the Imaginext's DC Super Frieds mini-series.
 * Wingnut and Screwloose first appear as comic book characters.
 * Wingnut's costume, much like in his classic counterpart, counts with his black gloves, black trunks and a utility belt.
 * The "Wingnut-a-rangs" are a homage to Batman's iconic Batarang gadget.
 * In this episode Wingnut ans Screwloose are parodies of a specific version of Batman and Robin, the ones from the 1966 TV series where the characters were played by Adam West and Burt Ward.
 * Wingnut's mask with the black front and the drawn eyebrows is a nod to Adam West's mask.
 * The Wing-Zookas are a homage to the series' Bat-Zooka.
 * Sound effects appear written on the screen as they did in the series to mimic the comics.
 * Screwloose's hair is based on that of Burt Ward's himself.
 * Screwloose's "Holly [blank], Wingnut!" is a reference to Burt Ward's Robin catchphrase, "Holly [blank], Batman!".
 * Aside from these references, the Turtles make nods to other comic book heroes from both DC and Marvel comics while debating which one is the best comic. Wingnut and Screwloose(Batman and Robin), Arachnid-Man (Spider-Man), Superb Man (Superman), The Indelible Bulge (The Incredible Hulk), and the Fantastic Four Food Groups (Fantastic Four).
 * Each of the comic covers shown are homages to real comic covers:
 * The Amazing Spider-Man #300, The Incredible Hulk #1 and Fantastic Four #1.
 * Wingnut and Screwloose's corrupted forms resemble there classic counterparts, as Wingnut's ears get uncovered by his cowl, his teeth get more protuberant and he changes into a hunched over posture. While Screwloose gets bald, matching his other versions.
 * April's obsession with the Aeon crystal was referenced from the "The Lord of the Rings" character named Gollum who been obsessed with the One Ring that he has found.
 * Michelangelo even points out that she's been acting as if the crystal was her "precious", the way Gollum refered to the one ring.