9 PM | NBC — Will & Grace Karen’s season-long investment will finally pay off when Jack (Sean Hayes) and Estefan (Brian Jordan Alvarez) finally tie the knot in the season finale. Did they book the Plaza? The foyer of Radio City Music Hall? Um, not exactly. “Flight cancellations and superstitions inspire them to host their fairy-tale wedding at every groom’s dream venue: the international terminal of an airport,” reveals EP David Kohan.