Star Trek: Voyager: String Theory #3: Evolution Evolution

Grief over Janeways impending death, coupled with anxiety brought on by the disappearance of Tom, Harry and the Doctor, is put aside as Chakotay assumes command of Voyager, and the crew prepares for attack by the enraged Nacene. Behind the lines, powerful forces have allied to give the starship aid. Toward this end, a familiar adversary sends Tom and Harry on a journey into the past. Elsewhere, the Doctor, trapped in a dimension alien to human understanding, reunites with the crew's former friend, Kes, to help secure the fates of those he left behind. For, as the crew will learn, Voyager's conflict is merely the surface manifestation of a more powerful upheaval still; a struggle which is rooted in the very foundation of the universe.