B'Elanna Torres attempts to restore a damaged robot's energy source.
This is a reasonably good episode with a decent sci-fi concept and good context for the prime directive.
The plot has some good ideas, particularly the backstory we eventually learn about the robots and how this affects the Prime Directive issue that Janeway raises with Torres.
Generally though I find the storytelling to be pretty flat as it generally moves from one dialogue exchange to the next, with lots of exposition and technobabble. Even the action scenes are just more dialogue with characters being shook about in the midst of battle.
Visually it's not bad. The robot characters resemble nothing other than men in suits, but for an old time Trek fan it's not problem. In fact if this was made in 1966 with the original crew it would probably be considered a classic. I like the Robocop tribute introduction scene.
I am a big Roxanne Dawson fan but I do not think this is her most consistent performance. She is good in some scenes but other lines come out a bit halfhearted. That being said you can hardly blame her with how bland the dialogue is at times.
It's a 6.5/10 for me but I round upwards.