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When Worlds Collide Part 2
Teenage Mutant Ninja Turtles (2012 TV series) episode
Season Code: 511
Episode: 110
Original airdate June 18, 2017
Written by Eugene Son
Supervising Producer Patrick Krebs
Producers: Brandon Auman
Directed by Alan Wan
Voice Direction Andrea Romano
Supervising Director  Ben Jones & Ciro Nieli
Episode chronology
← Previous Next →
"When Worlds Collide, Part 1" "Yojimbo"

Tales of the Teenage Mutant Ninja Turtles Season 5
March 19, 2017 - November 12, 2017
List of Teenage Mutant Ninja Turtles episodes


  1. Scroll of the Demodragon
  2. The Forgotten Swordsman
  3. Heart of Evil
  4. End Times
  5. When Worlds Collide, Part 1
  6. When Worlds Collide, Part 2
  7. Yojimbo
  8. Osoroshi no Tabi
  9. Kagayakei! Kintaro
  10. Lone Rat and Cubs
  11. The Wasteland Warrior
  12. The Impossible Desert
  13. Carmageddon!
  14. The Curse of Savanti Romero
  15. The Crypt of Dracula
  16. The Frankenstein Experiment
  17. Monsters Among Us!
  18. Wanted: Bebop & Rocksteady
  19. The Foot Walks Again!
  20. The Big Blow-Out!

Season 1Season 2 - Season 3 - Season 4 - Season 5

"When Worlds Collide, Part 2" is the sixth episode of the fifth and final season of the 2012 TV series, the one-hundred and tenth episode overall in the series, and is also part 2 of 2 of the When Worlds Collide dual special episode event.

Production-wise, it is the eleventh episode of Season 5, the one-hundred and fourteenth episode overall, and is also part 2 of 2 of the mid-season finale of Season 5. It first aired on June 18th, 2017.


Conclusion. The Newtralizer and his ally, Lord Dregg, lay siege on the city, and with the team's number slowly dwindling, the Turtles and their allies must fight even harder to defeat their foes. Meanwhile, Mikey returns after his presumed death with electrical powers similar to Newtralizer.


Major characters

Minor characters


The episode opens with a quick recap of what happened in the previous episode. As Lord Vringath Dregg's command ship begins hovering over New York City, and opening fire (secreting slime where Vreen insects grow and capture the humans), the Newtralizer laughs maniacally. Enraged, Leo pulls out a katana and tries to slash the newt, but he quickly disappears. As they stick together, Donnie asks what they should do. Before anyone can say anything, Leonardo gets abruptly seized and captured by a Vreen insect, who abducts him to Lord Dregg's ship. Concerned by this, Karai reaches out to save no avail. She watches in horror as more Vreen insects hover overhead before being tackled down by a Vreen who also tries to capture her. More Vreen come, attacking the Turtles and their allies. Sal Commander and Mona Lisa are eventually able to fight off the Vreen with their laser guns. The group is forced to retreat (lead by Bishop) but Sal Commander is also captured and abducted to Dregg's ship. The others are forced to retreat and find somewhere to hole up for the time being. The group takes shelter inside an abandoned warehouse, and barricades the walls and entrenches. During that time, Bishop blames Mona for Dregg's invasion, citing that he must have followed her here when they came looking for Newtralizer. As Raphael, Donnie, April, Karai, Mona Lisa, and Bishop avoid the Vreen swarming the city, they are shocked to find the Channel 6 building being made into a hive where the citizens of New York are being taken by the Vreen to be cocooned as Dregg's prisoners.

Soon after, Newtralizer arrives to finish them off, but in a strange twist, Michelangelo reappears, now sporting powers similar to Newtralizer, and still very much alive, but despite his aid, Donnie and Karai are captured as well by more Vreen, leaving April, Raph, Mikey, Mona, and Bishop to return to the lair to regroup and plan their next attack. On Dregg's ship, Newtralizer complains about destroying the whole planet, but Dregg intents to capture the human/Terran population and make them into living egg sacs for his Vreen army.

Back with the good guys, Bishop will have the Earth Protection Force send in a team to help deal with the Vreen and Dregg's command ship, while April, Mona, Raph, and Bishop attempt to provide a distraction with the Turtle Mech for Mikey to infiltrate and free the others. After the EPF forces are overpowered and forced to regroup, the Turtle Mech does its best to deal with Dregg's command ship before being destroyed, attempting to weaken it with pesticide and fire, which helps as further damage from within allows the EPF to take notice and resume their own attack from the outside to cause even more damage.

After Raphael, Mona, April, and Bishop get inside, Mikey frees Sal Commander, Leo, Donnie, and Karai, and after Raphael gives Dregg a good dose of electrocution, knocking him out cold after Mona sees he's vulnerable to it after zapping him with Rook's weapon, Mikey and Sal Commander end up in the power core of Dregg's ship, where when Newtralizer is about to take out Mikey for good, Sal Commander gets his vengeance for the wounds Newtralizer gave him by knocking him into the ship's power core, setting off a chain reaction that causes Newtralizer to overload the power core with his own electrical abilities, threatening to destroy the ship, and everyone on it. Mikey puts himself in harm's way with his powers to try and delay the inevitable to give everyone else time to abandon ship.

Realizing its fate, Dregg's ship takes flight in a vain attempt to escape, but after everyone else bails out and lands on a rooftop, they watch as Dregg's ship explodes, hopefully killing the alien warlord once and for all, and the Newtralizer as well. Mikey soon emerges completely unharmed and alive, and as everyone celebrates, Bishop uses the device meant for Newtralizer to remove Mikey's electrical powers, but rendering him stripped of his ninja gear and clothes as well, leaving him naked, save for his shell. The mission over, Mona and Sal Commander prepare to return to Salamandria to report to their general of what has transpired, but Mona requests that she be transferred to Earth to protect it from further threats. Understanding her reasons for staying, Sal Commander grants his Lieutenant her request, and after Raphael silences Bishop when he tries to counter this (by beheading him), Raphael suggests that Mona hook up with the Mighty Mutanimals and work with them. With that, Mona Lisa and Raphael kiss and caress. Though April admires this, the others (Karai, Leo, Donnie and Mikey) are largely disgusted and unsettled.


  • When the turtles (minus Mikey), April, Karai, Bishop, Mona Lisa, and Sal Commander jump out of Lord Dregg's ship, they can be heard going down grappling hooks. However, there are none to be seen.
  • Donnie witnessed Mikey returning before Donnie was captured, yet when Mikey rescued him Donnie was surprised to see Mikey still alive, even though he witnessed Mikey returning


  • This is a 2-part special episode.
  • This episode marks the final appearance of Mona Lisa, Sal Commander, Bishop, Lord Dregg, Newtralizer, and the Vreen.
  • The Newtralizer is defeated the same way as Darth Sidious was in Return of the Jedi.
  • When Mikey and Newtralizer confront one another inside Dregg's bug walker, Mikey gets to his feet in the same fashion as Raiden from Mortal Kombat. He uses his lightning ability to disappear and reappear on his feet.


  • When Worlds Collide, Part 2/gallery


  • When Worlds Collide, Part 2/Transcript