1. Grace Doesn’t Marry Danny
(“Pilot,” season 1, episode 1)
The incident that started it all — Will doesn’t think Danny (Tom Verica) is the one for Grace, but she ignores his advice (at least initially) and accepts Danny’s proposal. They head down to City Hall to get hitched, but Grace ultimately can’t go through with it and that’s how she ends up living with Will, kicking off the series as we know it.
