I really liked VOY: “One Small Step” (s06e08) wherein the crew work to salvage the wreckage of an ancient Earth probe from a dark matter asteroid

It’s a nice acknowledgement of the reality that space is fucking dangerous, and of the bravery of the men and women who shot themselves into it with little more than a few layers of metal and their wits to protect themselves. All this in the name of advancing science and exploration.

It closes with seven reading a eulogy for the centuries-dead astronaut who died diverting all power to the sensors so that knowledge would be preserved.