 Sisko and Lieutenant <unk> Dax ( Terry Farrell ) board the Enterprise but can find no trace of a bomb . They travel to K7 , and <unk> indicate that the bomb is in the grain storage compartments . They enter the compartments and discover that the poisoned grain has all been eaten by tribbles , who are now all dead . Suddenly Captain Kirk opens the compartment and is covered in falling tribbles . Dax and Sisko find the bomb before it can kill Kirk and the Defiant transports it into space where it explodes . The crew of the Defiant use the <unk> <unk> to travel back to the present time , and Sisko finishes explaining the situation to the Temporal Agents . The episode ends with <unk> ( <unk> <unk> ) in his bar on Deep Space Nine 's promenade , with numerous tribbles around him . 
