Beyond the Donatello Nebula
Teenage Mutant Ninja Turtles (1987) episode
Season Code: S04E36
Episode: 102
Original airdate December 1, 1990
Written by Dennis O'Flaherty
Episode chronology
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"Raphael Drives 'Em Wild" "Big Bug Blunder"
Teenage Mutant Ninja Turtles 1990 Season
September 8, 1990 - December 1, 1990
List of Teenage Mutant Ninja Turtles episodes


  • Syndication
  1. "Plan Six From Outer Space"
  2. "Turtles of the Jungle"
  3. "Michelangelo Toys Around"
  4. "Peking Turtle"
  5. "Shredder's Mom"
  6. "Four Turtles and a Baby"
  7. "Turtlemaniac"
  8. "Planet of the Turtles"
  9. "Name That Toon"
  10. "Menace Maestro, Please"
  11. "The Turtles and the Hare"
  12. "Once Upon a Time Machine"
  13. "Rondo in New York"
  14. "Superhero for a Day"
  15. "Back to the Egg"
  • Saturday Mornings
  1. "The Dimension X Story"
  2. "Son of Return of the Fly II"
  3. "The Big Zipp Attack"
  4. "Farewell, Lotus Blossom"
  5. "The Big Cufflink Caper!"
  6. "Rhino-Man"
  7. "Were-Rats from Channel 6"
  8. "Bebop and Rocksteady Conquer the Universe"
  9. "Slash - The Evil Turtle from Dimension X"
  10. "Rebel Without a Fin"
  11. "Poor Little Rich Turtle"
  12. "The Foot Soldiers are Revolting"
  13. "Big Bug Blunder"
  14. "Donatello's Degree"
  15. "Raphael Meets His Match"
  16. "Raphael Knocks 'em Dead"
  17. "Donatello Makes Time"
  18. "Leonardo Lightens Up"
  19. "Funny, They Shrunk Michelangelo"
  20. "Michelangelo Meets Bugman"
  21. "Leonardo Versus Tempestra"
  22. "What's Michelangelo Good For?"
  23. "Beyond the Donatello Nebula"
  24. "Unidentified Flying Leonardo"
  25. "Raphael Drives 'Em Wild"
  26. "Splinter Vanishes"

1987 Season1988 Season1989 Season1990 Season1991 Season1992 Season1992-1993 Vacation in Europe sideseason1993 Season1994 Season1995 Season1996 Season

"Beyond the Donatello Nebula" is an episode of the fourth season of the 1987 Teenage Mutant Ninja Turtles cartoon series.

Plot Synopsis

Donatello meets an alien named Algenon after trying to make contact with alien life.

Meanwhile, Hiram Grelch, an evil businessman, is vying to take over Channel 6 and sends his goons to kidnap April.




Home media releases


  • Teenage Mutant Ninja Turtles: Beyond the Donatello Nebula


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


Animation errors

  • When Donatello tells Algy to destroy Grelch's forcefield, he fully becomes Michelangelo.
  • Immediately after Donatello becomes Michelangelo, when the other Turtles pull up to the force field-covered tower building in the Turtle Van, the circular turtle shell on the front of the van that normally says "TURTLES" reads "UTLE."
  • After Michelangelo runs from the cops wearing a dog mask, Donatello is seen in the Turtle Van, but he's not with the Turtles.
  • When Leonardo unties April with his katana, he fully becomes Donatello, who's not even in this scene. However, Donatello is still seen with Leonardo's katana.
  • Part of the Channel 6 news desk disappears when Grelch's goons back April and Vernon up against the wall.
  • The '6' on the Channel 6 building's logo is coloured yellow instead of red when Donatello and Algy look over to Grelch's penthouse.
  • When Donatello introduces Algy to the Turtles, the ties on his belt are missing.
  • Michelangelo's right wrist band is purple when he takes a mask out of the Turtle Van drawer.


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