20,000 Leaks Under the City
Teenage Mutant Ninja Turtles (1987) episode
Season Code: 3
Episode: 14
Original airdate October 5, 1989
Written by Bob Schooley
Mark McCorkle
Producers: Kara Vallow
Episode chronology
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"The Ninja Sword of Nowhere" "Take Me to Your Leader"

Teenage Mutant Ninja Turtles 1989 Season

List of Teenage Mutant Ninja Turtles episodes


  1. "Beneath These Streets"
  2. "April Fool"
  3. "Sky Turtles"
  4. "Cowabunga Shredhead"
  5. "Invasion of the Turtle Snatchers"
  6. "The Old Switcheroo"
  7. "Turtles on Trial"
  8. "Attack of the 50-Foot Irma"
  9. "The Maltese Hamster"
  10. "The Fifth Turtle"
  11. "Camera Bugged"
  12. "The Ninja Sword of Nowhere"
  13. "Green With Jealousy"
  14. "Take Me to Your Leader"
  15. "Enter the Rat King"
  16. "Turtles at the Earth's Core"
  17. "Burne's Blues"
  18. "20,000 Leaks Under the City"
  19. "Beware the Lotus"
  20. "Leatherhead: Terror of the Swamp"
  21. "Super Bebop & Mighty Rocksteady"
  22. "Blast from the Past"
  23. "Attack of Big MACC"
  24. "The Turtle Terminator"
  25. "The Grybyx"
  26. "Mutagen Monster"
  27. "Casey Jones - Outlaw Hero"
  28. "Michelangelo's Birthday"
  29. "Turtles, Turtles Everywhere"
  30. "Return of the Fly"
  31. "The Making of Metalhead"
  32. "Four Musketurtles"
  33. "Usagi Yojimbo"
  34. "Shredderville"
  35. "Corporate Raiders from Dimension X"
  36. "Usagi Come Home"
  37. "Leatherhead Meets the Rat King"
  38. "Case of the Hot Kimono"
  39. "Pizza by the Shred"
  40. "Bye, Bye, Fly"
  41. "The Gang's All Here"
  42. "The Missing Map"
  43. "The Great Boldini"
  44. "Mister Ogg Goes to Town"
  45. "The Big Rip-Off"
  46. "The Big Break-In"
  47. "The Big Blow Out"

1987 Season1988 Season1989 Season1990 Season - 1991 Season1992 Season1992-1993 Vacation in Europe sideseason1993 Season1994 Season1995 Season1996 Season

"20,000 Leaks Under the City" is an episode from season 3 (1989) of the 1987 Teenage Mutant Ninja Turtles cartoon series.

Plot Synopsis

Krang is using his Super Pump from the Technodrome to flood the sewer system in New York City. Shredder, Bebop and Rocksteady go to the surface to make preparations. Bebop and Rocksteady steal a boat. Krang begins to pump water out of the Atlantic Ocean and into the sewers. The Turtles and Splinter are swept away by the water. Michaelangelo saves Splinter.

Suddenly Krang's pump goes wrong, and water is sucked from the ocean and dumped into the sewers. When the sewers are full, the water is overflowing the streets in the city. Soon, the whole city will be under water.

Burne Thompson, boss at Channel 6, is turning 50 years old and has a birthday party at a restaurant with April O'Neil, Vernon Fenwick and Irma. When the restaurant is flooded, April takes a small boat to try to find out why the city is being flooded.

The Turtles wait for Donatello, who had gone back to the sewers to take the Turtle Van. The Turtle Van is re-built into some kind of boat. April calls the Turtles via her turtle com. She wants help, because a shark is attacking her. Raphael saves April by sending the shark into a phone booth.

Shredder believes that the Turtles are destroyed but discover that they are till alive. Rocksteady throws a grenade against them. Later, the Turtles are gone.

Shredder calls Krang for help but Krang has his own problems: The Super Pump has, by an accident, sucked a giant squid into the Technodrome. But Krang gets an idea: He pumps the squid into New York City.

Burne Thompson and Irma send down Vernon underwater to find out what is happening, when the squid scares Vernon up again.

Later, the Shredder discovers the squid and throws a Brain Wave Neutralizer on the squid, which brainwashes the squid to help the Shredder.

When the Turtles are arriving, the squid attacks until the Shredder loses the remote control for the Brain Wave Neutralizer. The Turtles turn the squid against the Shredder.

Meanwhile, the Super Pump gets stuck in reverse and drains water from the flooded city, flooding the Technodrome.

The Turtles also lose the remote control, when Michaelangelo wants to "play" with the remote control, which causes the squid to set down the Shredder, Bebop and Rocksteady in the stolen boat, so they can escape. Donatello uses his bo staff to take away the Brain Wave Neutralizer from the squid. The squid swims back to the sea.

The water is going back to the sea, and April gives Burne Thompson a birthday present: the story on tape.

Character voices


  • Turtles' Lair
  • Technodrome
  • City Sewer System
  • Channel 6 building
  • City streets
  • Seafood Restaurant


Home media releases


  • Teenage Mutant Ninja Turtles Volume 4
  • Teenage Mutant Ninja Turtles Season 3
  • Teenage Mutant Ninja Turtles: The Complete Classic Series Collection


Animation errors

  • Donatello's bo staff disappears from his belt when he turns the sewer tube around when he and Michelangelo head back to the lair.
  • After the giant squid picks up Rocksteady, Rocksteady replaces Bebop and is still seen in the boat.
  • The top of the head of Krang's android body is coloured dark grey in the first shot at the beginning of the episode.
  • April is missing her back hip pack in one shot when Burne mentions tries to avoid going to his birthday lunch.
  • When the water floods the Turtles' lair, Splinter goes down the flood, but after the commercial break, he's still in the water above and never goes down the flood, allowing Michelangelo to rescue him before he goes down the flood.
  • When Raphael jumps in the water and swims to the phone booth, Donatello has Leonardo's colours.
  • In several scenes featuring the squid, the mind control device is absent from its head.


  • Greg Berg voices Donatello and Bebop instead of Barry Gordon.
  • Although it isn't specifically named this episode has the debut of the Sewer Party Tube. It's kind of hard to tell based on the straight black tube but the searchlights give it away.


  • Raphael: Telephone Call For Mr.Jaws!
    Raphael trying to trap a shark.


External links

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