Re: Greater Than The Sum Review *** POTENTIAL SPOILERS ***
The Unimatrix Zero is fairly prominent, yes. I was quite glad to see them followed up on after Voyager ignored them after that one two-parter (the first part of which I think was probably one of the lamest season cliffhangers in Trek).
"All you ever feel is anger. Why can't you ever express anything else?" Francine
"Because people make me mad all the time for being stupid about everything!" Stan