After a historic half-century ride, "Saturday Night Live" returns for its 51st on Saturday (NBC/4 at 11:29 p.m.). Here are five key questions:

Will Jimmy Kimmel turn up Saturday night?

Think about it: Guest host Bad Bunny has a few nice things to say about beleaguered late-night TV during the opening monologue when — presto! — out steps Jimmy , who by then will have wrapped a week's worth of shows at the Brooklyn Academy of Music. Maybe this seems too obvious, but what if Jimmy Fallon, Seth Meyers and Stephen Colbert join him in a display of late-night solidarity? "SNL" honcho Lorne Michaels, 80, loves spectacle and headlines. This would confer both.

Speaking of Lorne, is this the season where he finally says goodbye?

This dreary old saw of a question comes up (almost) every season

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