Cipher Bureau

When war is declared in 1914, glamorous Russian Carla Vanirska manages to get to Vienna from Luxembourg, with the help of Captain Rudolph Ritter of the Austrian army. Meanwhile, Ritter is assigned to detect the identity of a spy.

When a British secret agent's body washes up on the coast of Ireland, evidence implies that he was a traitor providing information to the Russians.

Lonely secret service officer Gustav meets a mysterious gypsy woman. It soon comes clear that it is a trap set by the Russian intelligence. Gustav is ordered to continue the relationship to get a better understanding of the enemy's plans. Unfortunately, Gustav finds himself struggling with the task, as he is falling in love with the enemy. Is there a way out of this situation?

British agent Alec Leamas refuses to come in from the Cold War during the 1960s, choosing to face another mission, which may prove to be his final one.

Roy Parmenter is an FBI agent in San Diego; 20 years ago his partner was killed by a Soviet spy, nicknamed Scuba, still at large. Scuba is now trying to extort the Soviets; to prove he's serious, he's killing their agents one by one, including "sleepers," agents under deep cover awaiting orders. Roy interviews a high school lad, Jeff Grant, an applicant to the Air Force Academy. In a routine background check, Roy discovers that Jeff's parents are sleepers. He must see if Jeff is also a spy, confront the parents yet protect them, and catch his nemesis. Meanwhile, the Soviets have sent their own spy-catcher, the loner Karpov, to reel in Scuba. Alliances shift; it's cat and mouse.

In the 1940s, the world was in turmoil, and it was crucial to decipher the enemy's communication codes in a timely and accurate manner. Rong Jinzhen has shown amazing mathematical talent since her childhood, and because she solved the problems assigned by her math teacher, she was noticed by more people, and even walked into the door of code-breaking by mistake.

A man escapes from a Russian prison and then from a United States embassy, taking with him some very important top secret information from both sides.

A U.S. agent attempts to track down a spy ring working to destroy the Panama Canal.

Joan Bannister is the wife of globe-trotting war correspondent David Bannister. Returning to the US, Bannister becomes suspicious when Joan begins keeping company with known Nazi functionaries, notably the sinister Mr. Peter. Suspecting that his own wife may be the elusive “Madame Spy” wanted by American authorities, Bannister is in for quite a few surprises.

Maria is married to Captain Franck of German Intelligence. He does not know she is a Russian assigned to spy on him. When he is told to uncover a leak, he vows revenge on his wife.

Sebastian is an undisciplined mathematics genius who works in the "cipher bureau" of the British Intelligence. While cracking enemy codes, Sebastian finds time to romance co-worker Rebecca Howard.