Must-watch TV — Last Sunday, the Bletchley Circle debuted on PBS. It follows the adventures of the unsung, code-breaking women of Bletchley into their post-war years. They re-unite to find and stop a serial killer. It features grungy, secret offices packed with obscure typewriters, flying fingers and terse conversation among sharp, seriously quirky women with great accents. They ride into London inside astonishingly beautiful train cars. In other words, geek Valhalla. Here’s a link. (yes, you can watch the first episode online)