Well, I don't get it: Kes broke up with Neelix in the episode where she was controlled by this maniac warlord. So, it was not her that broke up with him but obviously the mind of the warlord that possessed her body. Why are they still broken up then? It doesn't make any sense. It was clearly not Kes who wanted to break up. We have never seen another explanation. Neelix and Kes never resolved this situation. Normally when someone from the crew is possessed and not fully himself, his or her actions are accepted as not the will of the persons themselves. Just like in this episode not the doctor but his evil twin sedated Torres and shoved that dude over the cliff.
This episode is quite amusing. While the doctor tries to enhance his program by incorporating the traits and characteristics of well known personalities from history, he not only updates himself with their positive traits but also with their dark and hidden characters. This leads to this dark side breaking through and taking over the "body" of the doctor in good old Jeckyll & Hyde fashion. Picardo does a good job and playing his evil twin. Even his hair looks tousled and he walks more wooden, too.
I hoped though that Kes leaves with her new lover, but she doesn't. Well, this is still the last season for her. Tragically though: After Lien left this show she later also revealed her inner demons which turned her into some kind of female Hyde... quite sad to know what happened to this fragile young woman from the show.