While filming this episode, actors Pep Miràs (Franco) and Miko Jarry (Hitler) had lunch at a restaurant during a shooting break in full costume as their characters, to the puzzlement of waiters and other patrons.
The crew studied techniques from 40's and 50's films and incorporated them to filming, to add to the vintage feeling of the episode.
Neither the Spanish Juan Gea (Ernesto) nor the French Miko Jarry (Hitler) speak German. To deliver their lines in German, they got some help from fluent German-speaker David Luque (Himmler) and Austrian actor Markus Laimbauer (Schwensteiger).
Most of the tombstones from the cemetery scene were lent to the production team by fellow RTVE series Águila Roja (2009).
Episode title: "How time is rewritten"