Real World article
(written from a Production point of view)
Kirk offers a piece of the action

Boston Street seen in "A Piece of the Action"

The Boston Street backlot was located on the Paramount Pictures lot before the studio fire on 25 August 1983, which resulted in the destruction of most standing outdoor sets, and later the revamp of the studio facilities.

This backlot served as a filming location for the Star Trek: The Original Series episode "A Piece of the Action", depicting the surface of Sigma Iotia II, more precisely the exteriors of Jojo Krako's headquarters and the surrounding city street. Filming took place on Tuesday 7 November 1967. (These Are the Voyages: TOS Season Two, p. 494)

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