Gina Gershon rolls into Riverdale’s fall finale 

Here’s what’s happening in the world of television for Wednesday, December 12. All times are Eastern.

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Riverdale (The CW, 8 p.m., fall finale): Oh, Riverdale, you’re nuts. In tonight’s fall finale, Jughead and Archie—who, you’ll remember, are on a very meaningful, self-aware road trip—head to Toledo in search of a safe place to lay their weary heads. The reason they point themselves in the direction of that fair metropolis is that it’s there, in the Glass City, that Jughead’s mother (Gina Gershon) and sister Jellybean (Trinity Likins) can be found. So off they go, to feel things and make discoveries and do crunches, one assumes. Maintenance matters.