T.C.R.I, Techno Cosmic Research Institute, is a scientific corporation/organization with a large, mysterious and imposing facility in Brooklyn, New York. However, the facility is, in actuality, the secret terrestrial base of a race of aliens called Utroms who had crashed on the planet Earth sometime in the 1960s.

In the 2003 cartoon, their original branch was in Japan, but Yukio Mashimi one of the Guardians betrayed the Utroms to the Utrom Shredder, so they withdrew to New York in North America. While in the original Mirage Comics, they had been in New York the entire time and had nothing to do with the Shredder. During a fateful day, a company truck had lost a container of mutagen into the sewers, while at the same time, four baby turtles also went into the sewers. The building was under attack by the National Guard and the Utrom Shredder (in the 2003 series) in recent years, causing the Utroms to return back to their home world. In the first arcade game in the parking lot scene, a TCRI logo can be seen on one of the vans, in the 1987 animated show, there´s no TCRI. In the second movie it was changed to T.G.R.I: Techno Global Research Industries as the production was not supposed to have anything to do with aliens. The TCRI building also appears in the game Teenage Mutant Ninja Turtles 2: Battle Nexus.

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