Stardate 47391.2: After returning from a victorious bat'leth competition, Worf notices that reality changes from one moment to another, beginning with the color of his birthday cake. The changes become more severe, and at some point he is not able to return fire during a Cardassian attack because the console configuration suddenly becomes unfamiliar - causing Geordi's death. Also, he is now married to Deanna. After another leap he is the ship's first officer under Captain Riker. The only constant is that Geordi was always close to Worf when he slipped into another reality. Data finds out that Worf's quantum flux is out of sync with the rest of the universe, and the VISOR's subspace pulse triggers his transition from one quantum universe to another. Wesley discovers a subspace fissure where countless of these universes intersect and which widens after an attack by the powerful Bajorans of this universe, so that thousands of Enterprises from different universes keep popping up. Finally the correct Enterprise for Worf to return to is found. But as Worf is on his way, he is attacked by an Enterprise that wants to prevent his return because in their reality they are among the last survivors of a successful Borg attack. Captain Riker orders to fire at them, and the weakened ship explodes. The rift is finally sealed when Worf reaches his own universe, and he also travels back in time just prior to his birthday surprise party. The surprise is that there is no party in his universe, but just a visit by Troi who has a present for him.

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