Warning: Fullfrom the episode to follow.

"Have you ever fought living intestines!? I don't think so!"

Double downing on "what is known as awesome," this week's TMNT saw the return of two badass characters -- Slash and the Newtralizer -- now teamed up to beat the living snot out of Kraang. Meanwhile, Raphael and Casey were butting heads on their own, as Raph insisted that Casey was out of his element going up against the Kraang. Though I personally haven't had much of a gripe with Casey's near-superhuman abilities (he's Casey freakin' Jones, people!), it was smart having this issue addressed directly, with Raphael noting Casey's distinct lack of ninja training. But as Casey pointed out, he had attained his own unique brand of awesome. "It's mystical!"Of course, at the heart of this episode was Raphael's unresolved conflict with Slash, whose toxic association with Newtralizer was starting to take a toll. It seemed kind odd that Newtralizer was now able to talk, using a translator, but what better actor to give voice to the raddest villain around than Danny Trejo? Well, I say villain, although Newtralizer's role here was less antagonistic this time around, if only because he and Slash shared a common enemy with the Turtles. It was a good idea, too, giving the gruesome twosome an actual reason to fight the Kraang -- that is, they needed plutonium in order to teleport.Anyway, for Raphael, Slash's reappearance struck a chord in that it clashed with his more recent friendship with Casey. But it wasn't until Raphael saved Casey from an exploding building that their dispute came to a head, prompting Casey to leave. This left Raph to team up with the rest of the guys to take down Newtralizer and Slash. Donnie in particular had a fun role to play this week, implementing a spy roach to keep tabs on their vigilante rivals. ("I know, awesome, right? I'm smart!") Some clever multitasking indeed!It was also nice to see Slash coming to terms with his morality, establishing a concern for human lives (a sentiment he and the Newtralizer didn't share). While this seemed like an arbitrary notion for Slash, it did help solidify his standing as a true ally to Raphael. This became apparent in the final skirmish with the Kraang, as they revealed their latest invention, the Kraang Walker. Upon Newtralizer's betrayal, it was pretty cool having Raphael swoop in to save Slash, same as he did with Casey -- kind of a full-circle moment. Equally rad was Casey's reemergence, followed by his line, "I figured I'd wait for you all to be in trouble, and then I'd make an awesome heroic entrance!" Not only that, but Casey also proved his worth against the Kraang -- scoring the winning goal, as it were, by sinking a dynamite puck into the Kraang Walker.In the end, it was a merry reunion for Raph and Slash, albeit a short one. (Luckily, Raphael still has Casey to keep him company!) In terms of Raphael storylines, this was definitely a very strong one, and I was glad to see they left the door open for more Newtralizer -- even potentially transforming him in future installments? I guess we'll just have to wait and see -- "Rakka, rakka, rakka!"