Is Tajemnica twierdzy szyfrów coming back?

Tajemnica twierdzy szyfrów ended on November 30, 2007, on TVP1. The series concluded its single season with 13 episodes, which aired from September 7 to November 30, 2007.

The show was a drama, action, and adventure series set in 1945 during the last two months of World War II. It depicted the efforts of American and Russian intelligence services to find the secret 'Apparatus,' a device that helped Germans decipher Soviet telegrams. The story was connected to one of the biggest wartime secrets—the construction of the atom bomb in the underground laboratories of the Lower Silesia complex "Riese." The series explored espionage, secret missions, and the tense atmosphere of wartime Poland.

The cast included Paweł Małaszyński as Capt. Johann Jorg, Cezary Żak as SS-Hauptsturmfuhrer Harry Sauer, Marcin Dorociński as Afgan, Anna Dereszowska as Anna Maria Solof, Jan Frycz as SS-Obersturmbannführer Hans Jacob Globcke, Borys Szyc as SS-Untersturmführer Matheas Beer, Danuta Stenka as Joanna Russt, and Karolina Gruszka as Natalia Russt. The show did not have a rated score and had a runtime of 55 minutes per episode.