Clip comes from Polish TV series "Tajemnica twierdzy szyfrow"
"Last two months of World War II.The American and Russian intelligence services are desperately looking for the secret 'Apparatus'- a device which helps Germans to decipher Soviet telegrams. Functioning of this machine is associated with one of the biggest secrets of World War II - construction of the atom bomb in the underground laboratories of Lower Silesia complex "Riese".