It’s a race against the Klingons, Cardassians, and Romulans to complete a DNA scavenger hunt in an unexplored part of the galaxy.

Most of the sentient species in the Star Trek Universe resemble humanoid form. Of course, this is because most actors are… human. This episode gives a backstory as to why this is the case in sci-fi terms.

I summarize the plot and point out and explain all the references so you don’t have to