The guys get thrown back in time to TOS “The Trouble with Tribbles” and have to ensure events carry out as usual. Subplot involved Bashir noticing a pretty young thing that he suspects could be his grandmother, seeing as his family never knew who helped conceive her kids. Bashir, being needlessly high-minded, suspects that it may be a predestination paradox for him to become his own grandpa. He feels obligated to do “the nasty in the pasty” as it were. The rest is just my shenanigans and fan-fic shipping of O’Brien and Bashir.