Enterprise encounters a race called the Vissians who feature a third sex of "cogenitors" who are treated as second-class citizens.

Andreas Katsulas (Vissian Captain Drennik)
F.J. Rio (Vissian Chief Engineer)
Becky Wahlstrom (Cogenitor)
Laura Interval (Vissian Tactical Officer, Veylo)
Larissa Laskin (Vissian Engineer's Wife, Calla)

Stacie Renna (Traistana)

• After spending time with Trip — playing games, watching movies, learning to read — the cogenitor asks Archer for asylum. Archer denies the request. The cogenitor commits suicide.