The crew discover that aliens are experimenting on them.
There is an interesting conversation between Janeway and one of the aliens.
Alzen: "Please understand that there's a purpose to our actions. The data we gather from you may help us cure physical and psychological disorders that afflict millions. Isn't that worth some discomfort?"
Janeway: "I'm sure you'd see things differently, if your people were the ones being subjected to these experiments."
Alzen: "Just as your perspective would change if your people were the ones to live longer and healthier lives as a result. Don't forget, we've been observing you, Captain. I know the most important thing to you is the welfare of your crew. You'd even kill to protect them."
Janeway: "What you're doing isn't self-defence. It's the exploitation of another species for your own benefit. My people decided a long time ago that that was unacceptable, even in the name of scientific progress."
Janeway: "Sorry. These lab rats are fighting back."
It's good to know that one day in the future, humans of Earth will no longer exploit other species.
Does she mean sentient, intelligent species? Or all species?