In season 2, Russian Doll exchanges its first season time loop premise for a series of subway wormholes, transporting Nadia (Natasha Lyonne) between 2022, 1982, 1962, and 1944—and confirming to all New Yorkers who ride the 6 train just how many barely-washed decades of hard plastic seat exist under their butts. Trains are both the narrative vehicle of the season and its primary object: in particular, a Nazi gold train (called the “Hungarian Gold Train”) that allegedly contained valuable possessions “stored” for Hungarian and European Jews who were themselves hoarded onto different trains and transported to concentration camps. (Those latter...