In 2380, the end of the multiverse loomed because They were bored. At the same time, the Enterprise was swept to Gorsach IX in the primary universe by a quantum fissure. When the hostile IKS Qu attacked the starship native to that universe, USS Enterprise, the FSS Enterprise and other Enterprises intervened, protecting the USS Enterprise and firing on the Qu. When the primary Captain Picard and Q convinced Them to spare the multiverse, all Enterprises were returned to their native realms and the quantum fissure closed. (TNG novel: Q & A)