Just finished watching Star Trek: Strange New Worlds episode 4 Memento Mori. This one has elements of Balance of Terror which actually closely mapped to the 1957 submarine film The Enemy Below starring Robert Mitchum and Curd Jürgens. During World War Two, “an American destroyer discovers a German U-boat, and in the ensuing duel the American captain must draw upon all his experience to defeat the equally experienced German commander.”
Bonus points because David Hedison (as Al Hedison) had a role in the movie. He later played Captain Lee Crane of the nuclear submarine Seaview in the 1960s Irwin Allen TV show Voyage to the Bottom of the Sea.
As a child, I watched this film before Star Trek debuted, so when I saw Balance of Terror, I immediately recognized how writers Paul Schneider and Gene Roddenberry had “borrowed” from the movie’s plot.
At the beginning of the episode, we see scenes from prior shows revealing things about La’an, Uhura, and Hemmer.
Uhura is doing her engineering rotation and Hemmer is critical of her. Then again, he’s critical of everyone, so that’s not saying much. The Enterprise is taking a very powerful, very dangerous, and highly glorified air filter to the colony world Finibus 3 before their air becomes unbreathable. Heck of a place to settle down.