It’s one where Riker wakes up apparently with amnesia after an accident, several years after the “present”. Riker married a woman called Min and had a son, whom they called Jean-Luc. Several weird things happened, but the main clue was >!seeing a family photo with Min and Jean-Luc. “Min” is Minuet, the holographic character created by the Bynars when they took the Enterprise in Season 1. So Riker deduced that all was some kind of simulation.!<