1. Voyager finds an ancient space station that had been long abandoned. The crew finds information about ancient Earth, suggesting the aliens who built the place were able to travel to Earth quickly.
2. Voyager encounters other lost ship (of an unfamiliar race) on its way home, starting an arc of several episodes where the two ships travels through the quadrant.
It ends with the other ship finding a way home.
3. An episode that visits an incident that occured in Neelix's childhood, which somehow has some revelance, at least to Neelix, to Voyager's crew making a trade agreement with an questionable race.
4. Voyager encounters a wormhole that leads deep inside the Dominon Space. Janeway enlists help with the new allies from the area, to attack the Dominon Headquarters on the Vorta Homeworld in exchange for technology and information. The allies only agree after Janeway gave them a way to mine the wormhole terminus to prevent any Jem'Hadar from attacking back.