Guinan is introducing Worf to the wonders of prune juice when the Enterprise comes upon some sort of space time disturbance. Suddenly, a ship emerges - the Enterprise C, displaced 22 years in time. And it has survivors. Those pesky Klingons still won't go away, though, and as the Enterprise C limps back towards the rift, the Enterprise D devotes itself wholly to defending its doomed predecessor. Harried by three Birds of Prey, and with a core breach imminent, it looks like the end for both ships. Just as the Enterprise D is about to be destroyed, the Enterprise C makes it into the rift-