April's computer receives a strange garbled message, part of which Don recognizes as coordinates for her Puzzle Cube. Since the message mentions April's Uncle Augie, the two of them enter the coordinates and go to another world, where they meet a race of supposedly peaceful lizard beings.
This episode provides examples of
- Alternate Dimension: The world April, Don and Uncle Augie are sent to, as well as the world from "April's Artifact."
- Apocalyptic Log: How Don, April and Uncle Augie discover the Brotherhood's real intentions.
- Batman Gambit: Because Augie protected the transport artifact from magnetic overloads, April gets the idea to go back to the bug dimension instead and destroy the transport artifact there—ensuring the Brotherhood will be stranded when they attempt to follow.
- Big "NO!": The Councilor lets one out upon realizing that the transport artifact in the new world they've landed in has been destroyed.
- Bitch in Sheep's Clothing: The Brotherhood pretend to be friendly and peace loving but it's a facade and want to conquer and eat the inhabitants of earth.
- Call-Back: When the Turtles explain how they tunneled into April's basement, Mikey said it was in response to Karai paying her a visit.
- Can't Kill You, Still Need You: Donatello stops April from trying to rescue Augie, saying the Brotherhood still needs him to fix the transport artifact.
- Dirty Coward: Once confronted by the giant bugs, the Councilor abandons his men to try to save himself.
- Earn Your Happy Ending: After so many years, Augie returns home and is reunited with his family.
- Exact Eavesdropping: As Donnie wanders around the city, he happens by a couple of the Brotherhood talking loudly about how much they're looking forward to no longer pretending to be nice, invading Earth, and eating everyone there.
- Foreshadowing: Don's mutant-bug-inflicted injury from the previous episode is still bothering him...
- From Bad to Worse: Realizing they're on the wrong planet, the Councilor races back to the transport artifact and finds it destroyed. He vents about this turn of events, only to be confronted by the insect queen.
- Heroic Sacrifice: Doomed, the planet's original inhabitants disable the transport artifacts to ensure the Brotherhood couldn't threaten other worlds.
- Laser-Guided Karma: The Brotherhood end up on the other side of the food chain.
- Lizard Folk: The Brotherhood.
- My God, What Have I Done?: Augie when he learns the truth about the Brotherhood and that he's put Earth in danger.
- Nothing but Skulls: The mass grave in the Forbidden Zone.
- Remember the New Guy?: April's sister, Robin, appears in this episode, despite there were never previous indications that April had a sister. She even remembers her Uncle Augie.
- Reptiles Are Abhorrent: The Brotherhood.
- Sequel Episode: To "April's Artifact". April's final plan even requires returning to the dimension from that episode.
- Shout-Out:
- As April investigates the sounds coming from her basement, she overhears Mikey saying that if they've tunneled into the wrong building they'll have some splainin' to do.
- When Don discovers the Brotherhood's actual plan, he says it's like that episode of The Twilight Zone.
- Skewed Priorities: Played for laughs and lampshaded, as Augie admits he's more surprised to encounter April in another dimension than to learn a bipedal, talking turtle comes from New York City.
- Spanner in the Works: The Brotherhood's plan would've succeeded had April and Donnie not suddenly appeared on the planet.
- To Serve Man: The motivation of The Brotherhood, the lizard race. Don even shouts out the trope namer.
- Unfazed Everyman: Due to his various travels, Augie isn't remotely surprised that Donatello comes from New York instead of some strange other dimension.
