When Captain Picard's fencing match gets cut short by a bad case of deja vu, the Enterprise crew is forced to grapple with his romantic regrets, not to mention a temporal catastrophe that threatens the entire quadrant. Their investigation leads to a fringey German scientist, who married Picard's ex-girlfriend. Will Beverly's deep jealousy impact her obligation to keep the scientist alive? Is Data already old enough to need a reacher-grabber? Will the captain finally have a sexual encounter with a consenting adult? It's the episode where we discover that we'd be great future accordion players!