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This article is about the race of mutant-hunting robots from a previous Earth. For the character sometimes referred to as "Sentinel", see Sentinel Prime.

Sentinels were a race of gigantic robots that were created to hunt superpowered mutants on a previous Earth.


On one of the previous Earths that existed in the Original Universe, the Sentinels were developed by human scientists to rid their world of "mutants": a human subspecies that had superhuman abilities and thus were perceived as a threat to the baseline human race. An artificial intelligence named Master Mold was created to coordinate the Sentinels' activities and ensure that optimal tactics were being used in their mission to eradicate the mutant threat.[1]

20 years later, Master Mold turned the Sentinels against the humans and declared war on humanity. In the years that followed, most humans and mutants on Earth were killed and the Sentinels established total dominance over the planet. Some Sentinels left Earth and travelled outside of Master Mold's broadcasting range by unknown means, but they retained her goal to conquer and subjugate the human and mutant species.[1]

In 100,080 CMT, Kakamu found a deactivated Sentinel drifting in interdimensional space when he was teleported there by Blackout's usage of the Vahi Cube. He tried to absorb the Sentinel to make himself more powerful, but it exploded and his armour was destroyed in the blast. However, his antidermis escaped into the Original Universe and back into normal time, where he encountered even more Sentinels in deep space.[2] He somehow ingratiated himself with them and downloaded a portion of his knowledge into their memory cores. This caused them to declare war on Kakamu's enemies such as Blackout.[1] Kakamu inhabited a Sentinel for a while, but he soon left it because he found a Sentinel body to be too clunky and restrictive.[2]

The remaining Sentinels on Earth were destroyed when Blackout used unstable hadrium to destroy the planet later that year. Meanwhile, the Sentinels that Kakamu had encountered tracked down and attacked Blackout, but he defeated them and sent them to be studied and reverse-engineered by his scientists. A perfect working copy of a Sentinel that was loyal to Blackout was created and thrown into the Theta Gate, which caused dozens of Sentinels to emerge.[1] These Sentinels were added to the Legion of the Eclipse.[3] It is possible that some of these Sentinels remained members of the Legion up until its destruction by the Shattered Mirror Legion 50,000 years later.[4]


  • The Sentinels of BZPB were based specifically off of their depiction in the Wolverine and the X-Men animated series.
  • The Sentinels' Earth may have been the same Earth that Monarch originated from, because they were once listed as being enemies despite never meeting on-screen.[1]


  1. 1.0 1.1 1.2 1.3 1.4 Sentinel (revision on 19:17, Dec 14, 2009): "Sentinels are giant robots which are programmed to destroy super-powered beings. They were created on Earth to rid the world of these beings. Sentinels are controlled by a supreme intelligence named 'Master Mold'. They can shoot energy out of their hands. Some 20 years after they were created, Master Mold decided to turn the Sentinels against the humans. The Sentinels eradicated most humans and mutants from Earth. Later, an event occured which sent some of the Sentinels flying into space and they lost touch with Master Mold. Before landing on Bara Magna, Kakamu encountered 5 Sentinels and allied with them. Kakamu told them his enemies, and downloaded his knowledge into them. The remaining Sentinels on Earth were destroyed when Blackout used unstable hadrium to destroy Earth. Because the few Sentinels remaining now know about Blackout, they tracked him down and fired energy at him. Blackout responded by taking them off-line and having them taken to the lab to be studied and reverse-engineered. They were later tossed into the Theta Gate, somehow causing dozens of Sentinels to emerge. [...] They are Monarch's worst enemies."
  2. 2.0 2.1 Kakamu (OU) (revision on 16:31, Jul 08, 2017): "Blackout used his creation, the Vahi Cube, to transport Kakamu outside the Mata Nui robot and into interdimensional space. Kakamu tried to absorb a Sentinel drifting there to make himself more powerful, but it exploded, and his armour was destroyed in the blast. Kakamu's antidermis found a way back into normal time, and he encountered even more Sentinels. He inhabited one for a while, but later evacuated it as he found it too clunky and restrictive."
  3. Battle of Darkmount (revision on 20:09, Feb 17, 2012): "Blackout's Forces: Makuta Starscream, Barricade, Brawl and Bonecrusher, infinite army of demons, wraiths, Rahi, Rahkshi, Exo-Toa and Sentinels."
  4. Battle of Mata Nui II (revision on 20:22, Feb 17, 2012): "Blackout [...] summoned the Legion of the Eclipse. Tahar'ok then summoned the SMU Legion, which destroyed the LotE."

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