Raphael starts to suspect that Casey is slowing him and the other turtles down when the two attempt to stop some Kraang. But then they stumble upon the very Kraang they've been tracking beat up and torn apart. The culprits are Slash and the Newtralizer, who have teamed up to stop the Kraang at all costs.
- Big Damn Heroes: Invoked by Casey.
- Continuity Nod: Donatello reuses spy roach (Relax it's a different one).
- Heel–Face Turn: As ruthless as Slash can be, the idea of hurting innocent humans leaves a bad taste in his mouth; Newtralizer doesn't care. After Raph saves Slash from getting accidentally stomped by Newtralizer in the robot mech, Slash turns on the Newtralizer, and at the end of the episode leaves the turtles on good terms.
- Hero of Another Story: Slash and Newtralizer seem to have had a plethora of offscreen fights against the Kraang before the episode started, and even before that, Slash, like his appearance in "Metalhead Rewired", had been captured by the Kraang before being saved by Newtralizer, implying another story that we didn't get to see.
- Jerkass Has a Point: Raph getting pissed off at Casey was kind of justified. The first time they fought Newtralizer and Slash, Casey didn't listen to Raph and would've been run over by a car if Raph hadn't saved him. Later, when escaping an exploding warehouse, Casey almost got crushed by some debris, leaving Raph to save him again, and Casey acting like it wasn't a big deal.
- The Load: Casey, to an extent, until the end of the episode.
- "Not So Different" Remark: After blowing up at Casey, Raph blows off Mikey's comment that people have feelings with "I'm not people". Newtralizer uses the same excuse later. Mikey, of all people, points this out.
- Plot-Mandated Friendship Failure: Raph and Casey.
- Shout-Out: At least two to Star Wars. Namely, Mikey tries to trip up the Kraang walker with his chain (doesn't work out as well for him though) and Casey uses (one would suppose) "The Hockey Force" to slap shot an explosive puck into a an exhaust port on the walker (this succeeds).
- Suddenly Speaking: In his initial appearance, Newtralizer seemed incapable of speaking, the only vocalizing he did coming out as random yelling and roaring. Turns out he could speak after all; just no one could understand him (see Translator Microbes below).
- Teleport Spam: Slash and Newtralizer use their stolen Kraang tech to make teleporters and do quite a bit of this throughout the episode.
- Translator Microbes: Newtralizer initially cannot speak to Slash. He fiddles with a gizmo on his arm to translate his speech (aside from his "Rocka rocka rocka" Verbal Tic).
- What the Hell, Hero?: The other turtles give this to Raph after he blows up at Casey.
