Leatherhead is staying with the Turtles for the time being, but Bishop's experiments have left him with uncontrollable side-effects. To make matters worse, there's a big game hunter prowling the sewers...
This episode provides examples of
- Adapted Out: The African poacher-hunter who went after Marlin in the original Mirage story isn't included in this episode and Leatherhead instead is the one who defeats Marlin in the end.
- Cloud Cuckoo Lander: The hunter.
- Cradling Your Kill: Leatherhead cradles Mikey remorsefully after he thinks he's killed him.
- Dies Differently in Adaptation: At the time this episode premiered, Marlin was killed by an African poacher hunter in the comics while in this episode, Leatherhead is the one who takes down Marlin himself. Though in Mirage, Marlin would reappear again several years later, having survived his apparent death and goes after Leatherhead and the Turtles again, only to suffer a different death when a giant sea monster eats him. Either ways, his first apparent death and second seemingly final death in the comics differ from his fate in this episode.
- Egomaniac Hunter: Jack Marlin (the hunter)
- Enemy Within: Leatherhead's opening narration, and inner rage
- Hair-Trigger Temper: Leatherhead's anger issues this seaon reach a boiling point.
- I Am a Monster: Leatherhead says this word for word after he attacks Mikey
- I Call It "Vera": The hunter's laser rifle, Betsy.
- Large Ham: Leatherhead has moments of this when he's talking to the hunter
- Laser Hallway: The hunter sets one up in the sewers
- My God, What Have I Done?: Leatherhead says this almost word for word when he attacks Michelangelo in a fit of uncontrollable rage, leaving him unconscious and fearing him badly hurt/dead. Don't worry though; Mikey was fine.
- Mythology Gag:
- Leatherhead's new home resembles the Turtle's lair from the second film.
- During Leatherhead's nightmare, the Shredder has larger blades on his armor that makes him resemble Super Shredder in the same film.
- Narrator: Leatherhead's first one
- Outrun the Fireball: When Leo's escaping the blast from the land mines
- Please Kill Me if It Satisfies You: Leatherhead is so grief-stricken by his actions that he's willing and even encouraging to let the hunter kill him... that is, until the hunter mentions hunting down his friends too...
- Put on a Bus: Leatherhead moves into a nearby area, where he can deal with his anger in peace.
