Four TV shows, now acknowledged as the medium’s high point, each cannily predicted the ways in which America would start to crack apart.

An online platform removed 257 papers written or co-written by the University of Chicago’s Nicholas Polson after other academics raised questions.

Sepia tones, film cameras and ukuleles are a fast route to an imagined past of ease and quirkiness.

The episode shows the risks of using this new, relatively poorly understood technology in the middle of the Iran war