Epic Flail: One of the weapons April practices with while training with Splinter is a Chigriki, a wooden staff with a long weighted chain on one end. She also attempts to try a morning star as large as she is. Hilarity Ensues.
Flash Back: When Raph and Fishface are stuck together, the latter explains how he came to work for Shredder.
Funny Background Event: During Raphael and Fishface's fight in the opening, a Kraang can be seen kicking a Foot Ninja while he's down.
Know When to Fold 'Em: By the end, the Turtles, Xever, and Bradford are tired out after their fight with Baxter. They decide that it's just pointless to continue to try and fight, and just decide to go home and fight next time.
The Cold Opening devotes itself to showcasing the basic structure of the Turtles and the Foot, showing who takes command (Leonardo/Dogpound), the least patient/most temperamental (Raphael/Fishface), and the treatment of, as well as, The Smart Guy (Donatello/Baxter).
Paper Fan of Doom: Well, metal fan, another weapon April practices with. Splinter had intended to give it to his daughter Miwa when she was older, and gives it to April in her memory.
Revenge: Baxter's resentment at being mistreated and his grudge with the Turtles finally boils over.
Start of Darkness: This episode briefly explains Xever/Fishface's back-story, showing that he was stealing when he was a kid at the very least, and got bailed out by Oroku Saki when he finally got caught after a nearly flawless record.