Some TMNT stuff was always meant for grownups.

The Defense Advanced Research Projects Agency (D.A.R.P.A.) is an agency of the United States Department of Defense responsible for the development of new technologies for use by the military.

In Mirage Studios's comics, DARPA did a lot of experimentation with Mutants, psychic powers, and aliens. One of their agents was Louis Braunze, who in the 1950s was embed with psychic powers. They also are responsible for capturing Raphael and thus act as non-villainous antagonists for a majority of Volume 2.

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