There's a cave puzzle to decipher, Ben fancies himself a moral advisor, and Rusty's not having a good day either...buckle up, Heavy Metal Youths, it's party time! (We promise, there are brewskies...)

The mysteries of Owl Cave continue to unfold as the Sheriff's Department continues their investigation into its origins and meanings. But they aren't the only ones trying to crack the code: Windom Earle has been to the petroglyph and is now hot on the same trail. Enlisting the help of Major Briggs (for his connection to Project Blue Book and, thus, to Windom Earle) the fellas seem poised to make headway. Cooper also realizes that Audrey, Donna, and Shelly are being targeted by Windom Earle, and that the poem he sent them is one that Cooper sent to Caroline before she was murdered. Seems like the perfect time for Cooper to take Annie on a romantic nature study...but who's that watching from the shoreline? Elsewhere in Twin Peaks, Catherine lets Pete the poet have a go at the puzzle box Eckhardt left behind. There's another event for the Stop Ghostwood campaign, this time involving wine tasting. And Windom Earle finally makes good on his threat to take another piece from the board...literally.

Also! Ben is tempted to do bad! Donna confronts her parents! Bobby takes a tone with Shelly! Gordon makes his move! Jack gets a telegram! Coop drinks milk! With so many new players on the stage, the stakes are steadily building...but what is all this sweet work really worth? We're counting down the days to the big finale, when all (mostly) will be revealed!