Technically speaking, the first Orion to appear in Star Trek was Marta in Whom Gods Destroy. Vina, as "Orion slave girl" was a Talosian illusion in The Cage, and doubly so in The Menagerie, Part II.

As such, there are several roles, both large and small, that showcase aliens and other beings not seen in Star Trek in a very long time. In some cases, several decades. Here are our favorite Star ...