So I just saw the episode early, and my first impression of it is that it's decent. Not the best episode of the space arc but probably the best Triceraton episode we've gotten since their debut. Essentially, it's another homage episode partially.
If you've seen
Gremlins, it's sequel or know of the folklore of them in the mid 1900's, you've just seen a good portion of this episode. The designs were neat though reminded me of the 2002
Scooby-Doo monsters that Scrappy Doo utilized facial wise. Also, Mozar becoming a blood seeking monster was an awesome part of his character descending into madness. For the most part, nothing really to complain about except for one thing.
The main gripe I have with the episode though is that it feels Donatello questioning his intelligence wasn't played with enough. Sure, the Triceratons and gremlin creatures did get decent screentime, but I do wish Don had more to do. It's been a primary issue of mine throughout season 3 and 4: with so much to do in so little time, some things are kind of rushed. Unfortunately, for Don's only episode of the arc thus far (possibly at all) he's gotten the shaft big time. Just wished he could have gotten more to do as the plot looked good for him all things considered.
Overall, I don't think it was that bad of an episode, but a tiny bit disappointed. Certainly one of the best episodes in the space arc but could have been more with just an extra scene or two. I give it a 7 out of 10, decent episode that left me somewhat unsatisfied.
Positives:
+change in Mozar
+
Gremlins homage
+The ending (adorable)
+Improvement in the writing department
Negatives:
-Don's plot not fully executed in potential
-Space gremlins also lacked importance (would have liked the Triceratons to join in with em)
-Mikey's television line (... really?
I know Mikey loves T.V., but this is a serious issue, it can be fixed)
-April provoking the Triceratons to come (I'd expect that out of Casey or Raph, not her)