01PLOT

Donatello is trying to figure out a module-arrival pattern that would show them where the Technodrome is located. April urges them to let their brains rest by helping her decide where to vacation (Splinter suggests Florida), but is interrupted by a sudden earthquake.

The Turtles surface to see what may have happened, and are shocked to see a Diplodocus walking down the street. They try to herd the beast with limited success, and Michelangelo accidentally falls into a vast hole in the middle of a park. They decide to investigate further.

The answer involves a "lost world" under the Earth's crust, where dinosaurs still live and thrive in underground forests. The diplodocus was sent up by Rocksteady and Bebop on Shredder's orders, although he's irate that they didn't send something more dangerous. Krang orders him to get the giant crystal that allows the lost world to flourish, which they can use to repower the Technodrome. However, antigravity technology doesn't work near the crystal, which makes it difficult to get to.

The Turtles fly their blimp down into the lost world, only to immediately end up grounded by a Pteranodon and menaced by a Tyrannosaurus rex. Fortunately they're found by a Diplodocus, whom they dub "Dippy," and which allows them to ride him. They also find several modules waiting in a field, proving Shredder's presence there.

At this time, Shredder, Rocksteady, Bebop and a number of Foot Soldiers are heading for the crystal on foot. However, they soon find that it's more difficult than expected to actually reach the crystal.

Krang has his own plans, sending a small army of Foot Soldiers to build a small mobile fortress for him to ride inside. The Foot Soldiers are instead sent to attack the Turtles, but Dippy easily disposes of them, though he accidentally and briefly bucks the Turtles and April into a tar pit.

Shredder's minions eventually manage to grab the crystal, but he drops it when the Turtles distract him. He melts the ground around Dippy's feet, creating a river of lava that they barely manage to escape. And without the crystal's power, Dippy and the other dinosaurs begin to grow weaker.

An irritable Krang is repairing the crystal when Dippy starts banging on the fortress' hull but couldn't break through alone. He calls out Stegosaurus, Pachycephalosaurus, and Triceratops to attack the fortress, and they eventually tear open one of the hatches. The Turtles rush inside, and a small parade of the dinos follow them just as the crystal is finally repaired.

Raphael electrocutes Krang's body as Rocksteady and Bebop are taken out by a Stegosaurus' tail. Different people in both sides grab and pass the crystal among them until the Turtles and dinosaurs successfully escape with it. An enraged Krang starts burrowing the fortress back to the Technodrome.

With the crystal back in place, Donatello patches the Turtle blimp and they say their goodbyes to Dippy. The Turtles advise April to come there for her vacation, just before she's carried off by a Pteranodon, forcing the Turtles to chase her on Dippy's back.

02CAST & APPEARANCES

Renae Jacobs

Barry Gordon

Barry Gordon

Pat Fraley

Cam Clarke

Townsend Coleman

Rob Paulsen

Cam Clarke

James Avery

Peter Renaday

ALSO APPEARING

Foot Soldiers

03OBJECTS, VEHICLES & PLACES

OBJECTS & VEHICLESAntigravitation skimmerBōChannel 6 mini-cameraComlinkGiant crystalKatanaKrang's Android BodyKrang's mobile fortressLaser BlastersMicrowave rayNunchakuSaiTransport ModuleTurtle Blimp

LOCATIONSTurtle LairEarth's coreKrang's mobile fortress

SPECIESDinosaursAllosaurusArchaeopteryxBrachiosaurusPachycephalosaurusPteranodonStegosaurusTriceratopsTyrannosaurus rexHumansMutant ratMutant rhinocerosMutant turtlesMutant warthog

04SCREEN GRABS

9 frames. Screencaps via Turtlepedia (CC BY-SA).

05MEMORABLE QUOTES

Shredder: You incompetent imbeciles! Instead of that silly Diplodocus, why didn't you send up something fierce to deal with the Turtles-- like, a... Tyrannosaurus Rex? Rocksteady: Gee, boss, it ain't easy getting dinosaurs to obey. Bebop: Yeah, they're all muscle and no brains. Shredder:...I won't say it. It's too easy.

(Rumbling) April: What's that rumbling noise? Raphael: For once, it's not Michelangelo's stomach.

Leonardo: Turtles fight with honor! Shredder: Yes, but I fight dirty!

06NOTES & GOOFS

When the Turtles encounter a dinosaur in the streets, Donatello's Bō-staff is black and not brown.
When [[{{{2}}} (Rocksteady)|{{{2}}}]] says "Every man for himself" his mouth isn't moving.
During the fight inside Krang's mini-fortress, Shredder's feet match his shin guards before returning to black after Krang's electrocuted and before Bebop & Rocksteady are smacked by Dippy's tail.
In current prints of this episode, the MWS logo is cut during the end credits, showing only the 1992 Group W logo.

07HOME MEDIA

Teenage Mutant Ninja Turtles: Turtles at the Earth's CoreTeenage Mutant Hero Turtles: Attack of Big MACCTeenage Mutant Ninja Turtles: Volume 3Teenage Mutant Ninja Turtles: Season 3Teenage Mutant Ninja Turtles: The Complete Classic Series CollectionTeenage Mutant Ninja Turtles: Cowabunga Classics