As the Turtles continue resting at Casey's grandma's, tenacious monster hunter Dr. Abigail Finn finds footage of a "green creature" in the woods and will stop at nothing to find it.
Meanwhile, Leonardo has mostly recovered from his injuries, but remains spiritually wounded.
This episode provides examples of:
- Bait-and-Switch: April freaking out. Following The Teaser, you're made to think she's reacting to a monster, but she's just pissed over Casey messing up the floor she just mopped.
- Big "NO!": April, when Casey shows up messing up the floor with snow on his shoes.
- Brawn Hilda: Dr. Finn.
- Breather Episode: Taking a break from the main arcs.
- Bunny-Ears Lawyer: Donny describes Finn as quite brilliant and certifiable.
- The Cuckoolander Was Right: Finn was right about there being a "monster" in the woods. The point of the heroes' plan is to make her look like a crackpot.
- Death Glare: April gives this one out to Casey and that scared him enough to get him to leave the house.
- Determinator: Dr. Finn.April: Maybe this crazy monster hunter person would just give up and go away?Donatello: Dr. Abigail Finn doesn't give up. If she can't find what she's looking for out there, she'll come looking in here. She's obsessed with monster hunting.
- Didn't See That Coming: There being an actual monster living in the woods.
- Forging Scene: Raph helps Leo forge new swords as replacements for the ones the Shredder broke.
- Gentle Giant: The green creature.
- "Hell, Yes!" Moment: The reaction to Leo's suggestion that they go back to New York and settle things with the Shredder.
- Heroic BSoD: Leo spends the episode suffering through it."I don't need to hear how I messed up in New York, okay? I got my shell kicked. I let everyone down. I lost my swords!"
- He's Back: Leo, with the help of Raph.
- Hollywood Healing: Played with. Leo starts out some bandages and his arm in a sling. Over the course of forging some new swords, the bandages disappear.
- Innocuously Important Episode: The green creatures will later be revealed as humans mutated by the Y'lyntians.
- Jerk with a Heart of Gold: Rather than get on Leo's case, Raph helps him work through his recent defeat and get back to his old self.
- Mission Control: Parker is this for Dr. Finn.
- Nice Job Breaking It, Hero!: Mikey wandering around in public gets the whole mess started.
- Oh, Crap!: Casey, when Dr. Finn shows him a footage of Mikey.
- Real After All: The green creature, as the one Dr. Finn had recorded was actually Mikey.
- Samus Is a Girl/Monster Is a Mommy: The green creature.
- Show Within a Show: The Monster Hunter, so Title Drop ensues.
- You Monster!: Casey pretends to be captured by Dr. Finn and says this.