A devastating explosion in the vicinity draws the Voyager crew to an M-class planet newly devoid of all life. While investigating on the surface, Janeway and Paris fall through a subspace fracture, whereby a temporal flux sends them back one day before the explosion. As senior officers struggle to find a way to retrieve them, and Janeway and Paris struggle to observe the Prime Directive of non-interference, Kes experiences a psychic vision of the explosion and the lives it took. Its trigger comes as a surprise.
—statmanjeff