Director Cyril Tuschi; Pavel Khodorkovsky, Mikhail Khodorkovsky’s son; and New York Times business writer Joe Nocera, discuss Mikhail Khodorkovsky, who was once the richest man in Russia and is now one of the world’s most famous political prisoners. In the documentary “Khodorkovsky,” filmmaker Tuschi shows that Khodorkovsky’s tax embezzlement charges are bogus, and that his real crime was challenging Vladimir Putin. The film opens November 30 at Film Forum.