Parasitica

Parasitica is the 23rd episode of the series. It was scheduled on June 29, 2013, but was replaced with The Alien Agenda. For UK, it is scheduled to air on June 15, 2013, but instead, Pulverizer Returns was aired. Officially, it aired on June 22, 2013 in UK. It at last aired in the US July 20th 2013.

Official Description
Michaelangelo must fight his brothers when they fall under the control of a parasitic wasp.

Characters

 * Leonardo
 * Donatello
 * Raphael
 * Michelangelo
 * Mutant Wasps

Trivia

 * First appearance of the Mutant Wasps.
 * Parasitica is an order of parasitoid wasps.
 * This is the 1st time Leo, Raph and Donnie are under mind control.
 * This is the first episode where Michelangelo needs to fight his brothers, but this time Mikey needs to use his mind to save his brothers.
 * This is the first time Mikey is fighting solo without his brothers, and against his brothers.
 * This is the first episode where Leo was physically aggressive towards Mikey.
 * The shapeshifting alien disguised as a woman shown in Space Heroes is a parody of the Salt Vampire from the first episode of Star Trek.
 * When Mikey tries to lure Leo away with his Space Heroes comicbook, the publisherlabel in the topleft corner shows "Lock &" over a key. This is a reference to the comicbook series "Locke & Key", which is published by IDW, who also publish the TMNT comics.