It’s Ronald D. Moore’s only script during his abortive tenure as co-executive producer, and it’s excellent: a nifty look at one of Seven’s past missions as a Borg drone coming back to haunt her. The Star Trek: Voyager Rewatch looks at “Survival Instinct.”
Ronald D. Moore is one of the best writers of Trek in its screen history, and this episode is a lovely tease of what kinds of stories we might have seen had he not quit in disgust. This particular story has one of Moore’s hallmarks: looking at the characters’ pasts and using it to inform the story in the present. We saw it in Moore’s very first script, TNG’s “The Bonding,” which made excellent use of Picard’s discomfort with families on his ship, the history of the Crusher family, the death of Yar, and Worf’s general personality profile to craft a superb story that also subverted the usual Trek trope of the faceless away team victim.
Likewise with Moore’s first Voyager script. He took her comment in “One” about being separated from the Collective and built a story around it, one that also made good use of Chakotay’s past experiences in “Unity,” the EMH’s ongoing development, Seven’s assimilation story as seen in “The Raven” and “Dark Frontier,” and what was established in TNG’s “I, Borg” about how a drone separated from the Collective might behave to craft another excellent story.