This is a glimpse of what remains of Russia's opposition through the stuffy, bureaucratic prism of a Moscow courtroom. The protagonist is pale and drawn but invariably defiant, cuffed in a glass cage, or beamed in via grainy video-link, from a faraway jail. At the start a small crowd huddles as close as they can to wherever the defendant is, sending waves and messages of support through the glass or down the airwaves and the thousands of miles in between. Proceedings are conducted in the sped-up dreary monotone in which Russia's judiciary specialises. The defendant invariably loses. This Thursday, it...