By Gilbert Cruz, Jeremy Egner, Margaret Lyons and Rumsey Taylor.



Illustrations by Jason Logan.

Twenty-six years after coming to an abrupt end, the unlikeliest of network shows has somehow come back, this time on cable: The creators of the singular “Twin Peaks” will debut an 18-part new season on Showtime starting on Sunday, May 21.

Trying to guess what these new episodes will entail is a losing proposition — the show’s unpredictability is not just part of its charm, it’s part of its DNA. Logic and plot mechanics are often an afterthought on “Twin Peaks,” but as mood poems or surrealist explorations go, it’s bar none.

This visual glossary, then, was created to reacquaint viewers with the general “Twin Peaks” world, vibe and ideas, without obsessing over the story particulars too much. “I’ll see you again in 25 years,” Laura Palmer said in the original series finale. Well, here we are.