He was expected to appear in the series, but now we have the official word: Nathan Fillion will appear in the upcoming "Lanterns" series on HBO. The star of "The Rookie" will play Guy Gardner, a member of the Green Lantern Corp whose live-action role Fillion will debut this July in "Superman.

The DC Studios show will see Fillion reprise the role of Guy Gardner, which he will play in this summer's Superman movie.

To those asking what True Detective has to do with a Green Lantern show, we have an answer. The show centers on a rookie Lantern, John Stewart (Aaron Piere), and a veteran, Hal Jordan (Kyle Chandler), investigating a murder in the American heartland. If you think about it, rings are a flat circle, too.