Parallax

The plot is classic Star Trek. The Voyager finds itself in trouble and the crew find some clever way to pull themselves out of it. This was pretty much the essence of the original series, and the writers re-use the formula here as well, and not for the last time in the series either.

The sub-plot of B'Elanna struggling to fit into the Voyager's crew is pretty interesting as well, primarily because she's one of the best characters on the show. We also see the beginnings of the Doctor and Kes' working relationship and her first attempts to encourage him to find his personality and individuality beyond just being the Emergency Medical Hologram.