Kate Winslet, Vera Farmiga and Maggie Gyllenhaal turned down the part of Milada Horáková, eventually played by Ayelet Zurer.
Hanna Schygulla was considered for the part of Frantiska Plamínková, eventually played by Dagmar Bláhová.
David Mrnka had to do 20 rewrites on his own after the co-writers submitted the latest version(#32). Version #52 of the script went into production.
Karina Rchichev's debut.
Daniela Drtinová's debut.