This episode starts interesting but ends with a nosedive.
On an away mission on a hostile class Y planet Harry and Tom encounter a mimetic fluid that is able to copy the DNA of anything it gets in contact. Suddenly we have a clone from both of them that are each able to breathe the toxic gases of the planet. Only Star Trek writers know though, why copying DNA strands results in also cloning the uniforms, the haircuts, the way of speaking and the memories of the subjects.
Janeway gets in contact with clone Harry that shares some sort of hive mind with the fluid on the planet. He tells her that they became sentient now that they copied Harry's and Tom's DNA. Before they just existed and acted on instincts only. Now, being sentient they want to expand and want to clone the crew to build a community.
And here the episode hits rock bottom. Janeway agrees to an exchange of DNA if the crew decides so. And instead of showing the moral dilemma of cloning, the very nature of sentient life forms to be unique and individual, the difference of a human to a Borg drone that just is a number in a collective or the inner struggle of the crew when they have to decide if they want to have a clone on a far away planet, we are left with the image of like 50 cloned crew members on the planet while Voyager departs into the end credits. No discussions, no explanation, nothing. Janeway doesn't get tired in other episodes to praise human individuality. She has more than once fought against aliens that tried to take over someone of their crew. But here? Yeah sure, here is our DNA, clone us and do whatever with our bodies and our memories.
Absolute garbage. I doubt that anyone would have willingly agreed on being cloned. Especially since they know nothing about this species, have zero emotional connection to this strange alien fluid and have no knowledge about what their clones ultimately will be doing. Maybe this species is hostile (it cloned Harry and Tom without consent) and one day it will expand and conquer other planets by cloning their species. They aren't so different to changelings after all. Their clones could infiltrate societies, exchange high ranking politicians and military leaders and use them as their puppets. But nothing of that sort is elaborated in this episode. This race threatens the very nature of being human by just copying anyone and anything but the writers leave us with no questions answered.